f32 instead of i16

src-tauri/src/app/ox_speak_app.rs

@@ -5,7 +5,7 @@ use tokio;
 use tokio::sync::mpsc;
 use crate::core::capture::AudioCapture;
 use crate::core::mixer::AudioMixer;
-use crate::core::playback::AudioPlayback;
+use crate::core::playback::{AudioPlayback, Speaker};
 use crate::domain::audio_client::AudioClientManager;
 use crate::domain::event::{Event, EventBus};
 use crate::network::udp::UdpSession;
@@ -46,7 +46,10 @@ impl OxSpeakApp {
         let audio_capture = AudioCapture::default(event_bus.clone());
         println!("Initializing audio client");
         let audio_client_manager = AudioClientManager::new();
-        let audio_mixer = AudioMixer::new(audio_client_manager.clone());
+
+        // todo : pas idéal (la récup du sample_rate), car le mieux serais de récupérer ça dynamiquement. Peut être charger le mixer depuis audio_playback ?
+        let stream_config = Speaker::default().get_stream_config();
+        let audio_mixer = AudioMixer::new(stream_config.sample_rate.0 as usize, stream_config.channels as usize, audio_client_manager.clone());
         let audio_playback = AudioPlayback::default(event_bus.clone(), audio_mixer.clone());
 
         // UdpSession

src-tauri/src/core/capture.rs

@@ -7,6 +7,7 @@ use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
 // ✅ Supprimé rubato complètement !
 use crate::core::opus::AudioOpus;
 use crate::domain::event::{Event, EventBus};
+use crate::utils::audio_utils::AudioTools;
 use crate::utils::ringbuf::RingBuffer;
 
 #[derive(Clone)]
@@ -18,7 +19,7 @@ pub struct AudioCapture {
     event_bus: EventBus,
     microphone: Microphone,
     running: Arc<AtomicBool>,
-    ring_buffer: RingBuffer<i16>,
+    ring_buffer: RingBuffer<f32>,
     steam: Option<Stream>,
     worker: Option<JoinHandle<()>>,
 }
@@ -41,25 +42,12 @@ impl Microphone {
     }
 
     pub fn get_stream_config(&self) -> StreamConfig {
-        let supported_channels = self.get_supported_channels();
-
-        // Priorité : mono si supporté, sinon prend le premier disponible
-        let channels = if supported_channels.contains(&1) {
-            1  // ✅ Mono préféré
-        } else {
-            supported_channels.first().copied().unwrap_or(2)  // Fallback
-        };
-
-        StreamConfig {
-            channels,
-            sample_rate: SampleRate(48_000), // ✅ Force 48kHz
-            buffer_size: BufferSize::Default,
-        }
+        self.get_input_config().into()
     }
 
     pub fn build_stream<F>(&self, callback: F) -> Stream
     where
-        F: FnMut(&[i16], &cpal::InputCallbackInfo) + Send + 'static,
+        F: FnMut(&[f32], &cpal::InputCallbackInfo) + Send + 'static,
     {
         let config = self.get_stream_config();
         self.device.build_input_stream(
@@ -138,11 +126,12 @@ impl AudioCapture {
         let worker_running = self.running.clone();
         let event_bus = self.event_bus.clone();
         let stream_config = self.microphone.get_stream_config();
+        let sample_rate: usize = stream_config.sample_rate.0 as usize;
+        let channels: usize = stream_config.channels as usize;
 
         println!("Audio config: {} channels @ {}Hz",
                  stream_config.channels, stream_config.sample_rate.0);
 
-        // ✅ Simple : on assume 48kHz partout !
         let opus = AudioOpus::new(48_000, 1, "voip");
         let mut encoder = opus.create_encoder().unwrap();
         let reader = self.ring_buffer.reader();
@@ -151,8 +140,8 @@ impl AudioCapture {
         self.worker = Some(thread::spawn(move || {
             println!("Audio processing thread started");
 
-            let frame_size = 48_000 * 10 / 1000; // ✅ 10ms = 480 samples @ 48kHz
-            let mut raw_buffer = vec![0i16; frame_size];
+            let frame_size = sample_rate * 10 / 1000; // ✅ 10ms = 480 samples @ 48kHz / 441 @ 44.1khz
+            let mut raw_buffer = vec![0f32; frame_size];
 
             while worker_running.load(Ordering::Relaxed) {
                 let _read_count = reader.pop_slice_blocking(&mut raw_buffer);
@@ -161,16 +150,10 @@ impl AudioCapture {
                     break;
                 }
 
-                // ✅ Processing ultra-simple
-                let processed_audio = Self::process_audio_frame(
-                    &stream_config,
-                    &raw_buffer
-                );
+                let sample = AudioTools::sample_to_mono(&raw_buffer, channels);
+                // todo : voir si il est nécessaire d'intégrer un resampling avec AudioResampler
 
-                // Events
-                event_bus.emit_sync(Event::AudioIn(processed_audio.clone()));
-
-                match encoder.encode(&processed_audio) {
+                match encoder.encode(&sample) {
                     Ok(encoded_data) => {
                         event_bus.emit_sync(Event::AudioEncoded(encoded_data))
                     }
@@ -178,6 +161,8 @@ impl AudioCapture {
                         println!("Error encoding: {e}");
                     }
                 }
+                // Events
+                event_bus.emit_sync(Event::AudioIn(sample));
             }
         }));
     }

src-tauri/src/core/mixer.rs

@@ -2,47 +2,84 @@
 
 use std::sync::Arc;
 use arc_swap::ArcSwap;
+use cpal::SampleRate;
 use crate::domain::audio_client::AudioClientManager;
+use crate::utils::audio_utils::{AudioResampler, AudioTools};
 use crate::utils::ringbuf::{RingBufReader, RingBufWriter, RingBuffer};
 
 #[derive(Clone)]
 pub struct AudioMixer {
     audio_client_manager: AudioClientManager,
-    buffer_writer: Arc<RingBufWriter<i16>>,
-    buffer_reader: Arc<RingBufReader<i16>>
+    buffer_writer: Arc<RingBufWriter<f32>>,
+    buffer_reader: Arc<RingBufReader<f32>>,
+
+    internal_sample_rate: usize,
+    output_channels: usize,
+    output_sample_rate: usize,
+    resampler: AudioResampler,
 }
 
 impl AudioMixer {
-    pub fn new(audio_client_manager: AudioClientManager) -> Self {
+    pub fn new(output_sample_rate: usize, output_channels: usize, audio_client_manager: AudioClientManager) -> Self {
         let (buffer_writer, buffer_reader) = RingBuffer::new(2048).split();
         Self {
             audio_client_manager,
             buffer_writer: Arc::new(buffer_writer),
-            buffer_reader: Arc::new(buffer_reader)
+            buffer_reader: Arc::new(buffer_reader),
+            internal_sample_rate: 48000,
+            output_sample_rate,
+            output_channels,
+            resampler: AudioResampler::new(),
         }
     }
-    pub fn mix_next_frame(&self, size: usize) {
-        let mut frames = Vec::<Vec<i16>>::new();
-        // Récupérer les buffers audio des utilisateurs, par défaut, ils sont en mono, donc size / 2
-        // convertir en stéréo, donc size * 2 frames
-        let users_audio = self.audio_client_manager.take_audio_collection(size/2).into_iter()
-            .map(|audio| AudioMixer::mono_to_stereo(audio))
-            .collect::<Vec<Vec<i16>>>();
-        frames.extend_from_slice(&users_audio);
+    pub fn mix_next_frame(&self, output_size: usize) {
+        // 1. Calcule combien de samples 48kHz on doit récupérer
+        let ratio = self.internal_sample_rate as f32 / self.output_sample_rate as f32;
+        let internal_frames_needed = ((output_size / self.output_channels) as f32 * ratio).ceil() as usize;
 
-        // Récupérer tous les sons des notifications (pas encore dev)
+        // 2. Récupère les données utilisateurs (48kHz mono)
+        let users_audio = self.audio_client_manager.take_audio_collection(internal_frames_needed);
 
-        let mixed_frame = if frames.is_empty() {
-            vec![0i16; size]
-        }else{
-            Self::mix_frames(&frames, size)
+        // 3. Mix en 48kHz mono
+        let mixed_internal = if users_audio.is_empty() {
+            vec![0f32; internal_frames_needed]
+        } else {
+            AudioTools::mix_frames(&users_audio, internal_frames_needed)
         };
 
-        self.buffer_writer.push_slice_overwrite(&mixed_frame);
+        // 3. Mix en 48kHz mono (résultat en f32)
+        let mixed_internal = if users_audio.is_empty() {
+            vec![0.0f32; internal_frames_needed]
+        } else {
+            AudioTools::mix_frames(&users_audio, internal_frames_needed)
+        };
+
+        // 4. Resample 48kHz -> output_rate si nécessaire
+        let resampled = if self.internal_sample_rate != self.output_sample_rate {
+            self.resampler.resample(
+                &mixed_internal,
+                self.internal_sample_rate,
+                self.output_sample_rate,
+                1 // mono
+            )
+        } else {
+            mixed_internal
+        };
+
+        // 5. Convert mono -> output_channels
+        let final_frame = AudioTools::change_channel_count(
+            &resampled,
+            1,
+            self.output_channels
+        );
+
+        // 6. Écrit dans le ringbuffer (pas besoin de resize exacte)
+        self.buffer_writer.push_slice_overwrite(&final_frame);
+
     }
 
-    pub fn read(&self, size: usize) -> Vec<i16> {
-        let mut data = vec![0i16; size];
+    pub fn read(&self, size: usize) -> Vec<f32> {
+        let mut data = vec![0f32; size];
         // Essaie de pop autant d'échantillons que possible
         let read = self.buffer_reader.pop_slice(&mut data);
         // Si on n'a pas tout eu, les éléments restants sont déjà à 0
@@ -51,36 +88,3 @@ impl AudioMixer {
 
 
 }
-
-impl AudioMixer {
-    fn mono_to_stereo(mono_samples: Vec<i16>) -> Vec<i16> {
-        let mut stereo_data = Vec::with_capacity(mono_samples.len() * 2);
-
-        // Chaque échantillon mono devient deux échantillons stéréo identiques
-        for sample in mono_samples {
-            stereo_data.push(sample); // Canal gauche
-            stereo_data.push(sample); // Canal droit
-        }
-
-        stereo_data
-    }
-
-    fn mix_frames(frames: &[Vec<i16>], size: usize) -> Vec<i16> {
-        let mut mixed = vec![0i32; size];
-
-        for frame in frames {
-            for (i, &sample) in frame.iter().enumerate() {
-                if i < size {
-                    mixed[i] += sample as i32;
-                }
-            }
-        }
-
-        let count = frames.len().max(1) as i32; // éviter la division par zéro
-        mixed
-            .into_iter()
-            .map(|sample| (sample / count).clamp(i16::MIN as i32, i16::MAX as i32) as i16)
-            .collect()
-
-    }
-}

src-tauri/src/core/opus.rs

@@ -1,4 +1,5 @@
 use opus::{Application, Channels, Decoder, Encoder};
+use crate::utils::audio_utils::AudioSample;
 
 #[derive(Clone)]
 pub struct AudioOpus{
@@ -65,22 +66,31 @@ impl AudioOpusEncoder {
         Ok(Self{audio_opus, encoder})
     }
 
-    pub fn encode(&mut self, frames: &[i16]) -> Result<Vec<u8>, String> {
-        let mut output = vec![0u8; 1276]; // 1276 octets (la vraie worst-case recommandée par Opus).
-        let len = self.encoder.encode(frames, output.as_mut_slice())
+    // Méthode générique qui accepte i16 ou f32
+    pub fn encode<T: AudioSample>(&mut self, frames: &[T]) -> Result<Vec<u8>, String> {
+        // Convertir tous les échantillons vers i16
+        let i16_frames: Vec<i16> = frames.iter().map(|sample| sample.to_i16()).collect();
+
+        // Utiliser la logique d'encodage existante
+        let mut output = vec![0u8; 1276];
+        let len = self.encoder.encode(&i16_frames, output.as_mut_slice())
             .map_err(|e| format!("Erreur encodage: {:?}", e))?;
         output.truncate(len);
         Ok(output)
     }
 
-    // 🔄 Approche avec buffer réutilisable (encore plus optimal)
-    fn encode_reuse(&mut self, frames: &[i16], output: &mut Vec<u8>) -> Result<usize, String> {
+    // Version avec buffer réutilisable
+    pub fn encode_into_slice<T: AudioSample>(&mut self, frames: &[T], output: &mut Vec<u8>) -> Result<usize, String> {
+        let i16_frames: Vec<i16> = frames.iter().map(|sample| sample.to_i16()).collect();
+
         output.clear();
         output.resize(1276, 0);
-        let len = self.encoder.encode(frames, output.as_mut_slice()).unwrap();
+        let len = self.encoder.encode(&i16_frames, output.as_mut_slice())
+            .map_err(|e| format!("Erreur encodage: {:?}", e))?;
         output.truncate(len);
         Ok(len)
     }
+
 }
 
 pub struct AudioOpusDecoder{
@@ -101,10 +111,26 @@ impl AudioOpusDecoder {
         Ok(Self{audio_opus, decoder})
     }
 
-    pub fn decode(&mut self, frames: &[u8]) -> Result<Vec<i16>, String> {
-        let mut output = vec![0i16; 5760];
-        let len = self.decoder.decode(frames, output.as_mut_slice(), false).map_err(|e| format!("Erreur décodage: {:?}", e))?;
-        output.truncate(len);
+    pub fn decode<T: AudioSample>(&mut self, frames: &[u8]) -> Result<Vec<T>, String> {
+        let mut i16_output = vec![0i16; 5760];
+        let len = self.decoder.decode(frames, i16_output.as_mut_slice(), false)
+            .map_err(|e| format!("Erreur décodage: {:?}", e))?;
+        i16_output.truncate(len);
+
+        let output: Vec<T> = i16_output.iter().map(|&sample| T::from_i16(sample)).collect();
         Ok(output)
     }
+
+    // Décodage avec buffer réutilisable
+    pub fn decode_into_slice<T: AudioSample>(&mut self, frames: &[u8], output: &mut Vec<T>) -> Result<usize, String> {
+        let mut i16_buffer = vec![0i16; 5760];
+        let len = self.decoder.decode(frames, i16_buffer.as_mut_slice(), false)
+            .map_err(|e| format!("Erreur décodage: {:?}", e))?;
+        i16_buffer.truncate(len);
+
+        output.clear();
+        output.extend(i16_buffer.iter().map(|&sample| T::from_i16(sample)));
+
+        Ok(len)
+    }
 }

src-tauri/src/core/playback.rs

@@ -43,11 +43,7 @@ impl Speaker {
         // Lister toutes les configurations supportées
         self.print_supported_configs();
 
-        StreamConfig {
-            channels: 2,
-            sample_rate: SampleRate(44100),
-            buffer_size: BufferSize::Default
-        }
+        self.get_output_config().into()
     }
 
     pub fn print_supported_configs(&self) {
@@ -131,7 +127,7 @@ impl Speaker {
 
     pub fn build_stream<F>(&self, callback: F) -> Stream
     where
-        F: FnMut(&mut [i16], &cpal::OutputCallbackInfo) + Send + 'static,
+        F: FnMut(&mut [f32], &cpal::OutputCallbackInfo) + Send + 'static,
     {
         let config = self.get_stream_config();
 

src-tauri/src/domain/audio_client.rs

@@ -11,8 +11,8 @@ use crate::utils::shared_store::SharedArcMap;
 pub struct AudioClient {
     uuid: uuid::Uuid,
     decode_sender: mpsc::Sender<DecodeRequest>,
-    buffer_reader: RingBufReader<i16>,
-    buffer_writer: RingBufWriter<i16>
+    buffer_reader: RingBufReader<f32>,
+    buffer_writer: RingBufWriter<f32>
 }
 
 struct DecodeRequest {
@@ -27,7 +27,7 @@ pub struct AudioClientManager {
 
 impl AudioClient {
     pub fn new() -> Self {
-        let (writer, reader) = RingBuffer::<i16>::new(4096).split();
+        let (writer, reader) = RingBuffer::<f32>::new(4096).split();
 
         let (decode_sender, mut decode_reader) = mpsc::channel::<DecodeRequest>(100);
         let writer_clone = writer.clone();
@@ -39,13 +39,13 @@ impl AudioClient {
             while let Some(request) = decode_reader.recv().await {
                 // si la séquence est "trop vieille" on la drop. (voir plus tard pour un système de rattrapage si c'est possible)
                 if last_sequence < request.sequence {
-                    // todo : si le décodage est trop long, voir pour le mettre dans un thread
-                    //  avec let result = tokio::task::spawn_blocking({
+                    // todo : si le décodage est trop long, voir pour le mettre dans un thread avec
+                    //  let result = tokio::task::spawn_blocking({
                     //  let data = request.data.clone();
                     //      move || decoder.decode(&data)
                     //  }).await.unwrap();
                     let start = std::time::Instant::now();
-                    let result = decoder.decode(&request.data);
+                    let result = decoder.decode::<f32>(&request.data);
                     if start.elapsed() > Duration::from_millis(1) {
                         println!("⚠️ Frame drop possible: {:?}", start.elapsed());
                     }
@@ -78,12 +78,12 @@ impl AudioClient {
         });
     }
 
-    pub fn read_audio(&self, size: usize) -> Option<Vec<i16>> {
+    pub fn read_audio(&self, size: usize) -> Option<Vec<f32>> {
         if self.buffer_reader.len() < size {
             return None;
         }
 
-        let mut buffer = vec![0i16; size];
+        let mut buffer = vec![0f32; size];
         let read_count = self.buffer_reader.pop_slice(&mut buffer);
 
         if read_count == size {
@@ -122,7 +122,7 @@ impl AudioClientManager {
         let _ = self.audio_clients.get(&uuid).unwrap().write_audio(sequence, data);
     }
 
-    pub fn take_audio_collection(&self, size: usize) -> Vec<Vec<i16>> {
+    pub fn take_audio_collection(&self, size: usize) -> Vec<Vec<f32>> {
         let mut buffers = Vec::new();
 
         for client in self.audio_clients.values() {

src-tauri/src/domain/event.rs

@@ -5,7 +5,7 @@ pub enum Event {
     AppStarted,
     AppStopped,
 
-    AudioIn(Vec<i16>),
+    AudioIn(Vec<f32>),
     AudioEncoded(Vec<u8>),
 
     PlaybackTick(usize),

src-tauri/src/utils/audio_utils.rs

@@ -1,7 +1,71 @@
+use std::fmt::Debug;
 use rubato::{Resampler, SincFixedIn, SincInterpolationType, SincInterpolationParameters, WindowFunction};
 use parking_lot::Mutex;
 use std::sync::Arc;
 
+/// Trait pour les échantillons audio avec conversion automatique
+pub trait AudioSample: Copy + Clone + Debug + Send + Sync + 'static {
+    fn to_i16(&self) -> i16;
+    fn to_f32(&self) -> f32;
+    fn from_i16(value: i16) -> Self;
+    fn from_f32(value: f32) -> Self;
+    fn zero() -> Self;
+    fn clamp_audio(&self) -> Self;
+}
+
+impl AudioSample for i16 {
+    fn to_i16(&self) -> i16 {
+        *self
+    }
+
+    fn to_f32(&self) -> f32 {
+        *self as f32 / i16::MAX as f32
+    }
+
+    fn from_i16(value: i16) -> Self {
+        value
+    }
+
+    fn from_f32(value: f32) -> Self {
+        (value.clamp(-1.0, 1.0) * i16::MAX as f32) as i16
+    }
+
+    fn zero() -> Self {
+        0i16
+    }
+
+    fn clamp_audio(&self) -> Self {
+        *self // i16 est déjà dans sa plage valide
+    }
+}
+
+impl AudioSample for f32 {
+    fn to_i16(&self) -> i16 {
+        (self.clamp(-1.0, 1.0) * i16::MAX as f32) as i16
+    }
+
+    fn to_f32(&self) -> f32 {
+        *self
+    }
+
+    fn from_i16(value: i16) -> Self {
+        value as f32 / i16::MAX as f32
+    }
+
+    fn from_f32(value: f32) -> Self {
+        value
+    }
+
+    fn zero() -> Self {
+        0.0f32
+    }
+
+    fn clamp_audio(&self) -> Self {
+        self.clamp(-1.0, 1.0)
+    }
+}
+
+
 /// Resampler audio optimisé avec rubato pour temps réel
 #[derive(Clone)]
 pub struct AudioResampler {
@@ -13,15 +77,15 @@ pub struct AudioResampler {
 
 struct ResamplerState {
     resampler: Option<SincFixedIn<f32>>,
-    current_from_rate: u32,
-    current_to_rate: u32,
+    current_from_rate: usize,
+    current_to_rate: usize,
     current_channels: usize,
 }
 
 struct ConversionBuffers {
     f32_buffer: Vec<f32>,
     planar_input: Vec<Vec<f32>>,
-    output_i16: Vec<i16>,
+    planar_output_buffer: Vec<Vec<f32>>, // Ajouté pour éviter des allocs
 }
 
 impl AudioResampler {
@@ -36,19 +100,19 @@ impl AudioResampler {
             conversion_buffers: Arc::new(Mutex::new(ConversionBuffers {
                 f32_buffer: Vec::with_capacity(8192),
                 planar_input: Vec::new(),
-                output_i16: Vec::with_capacity(8192),
+                planar_output_buffer: Vec::new(),
             })),
         }
     }
 
-    /// Resample audio en gardant la continuité entre les chunks
-    pub fn resample(
+    /// Resample audio générique - fonctionne avec i16 et f32
+    pub fn resample<T: AudioSample>(
         &self,
-        input: &[i16],
-        from_sample_rate: u32,
-        to_sample_rate: u32,
+        input: &[T],
+        from_sample_rate: usize,
+        to_sample_rate: usize,
         channels: usize,
-    ) -> Vec<i16> {
+    ) -> Vec<T> {
         // ✅ Pas de conversion si même sample rate
         if from_sample_rate == to_sample_rate || input.is_empty() {
             return input.to_vec();
@@ -58,11 +122,6 @@ impl AudioResampler {
         let mut buffers = self.conversion_buffers.lock();
 
         // 🔄 Recrée le resampler si configuration changée
-        let need_new_resampler = state.resampler.is_none()
-            || state.current_from_rate != from_sample_rate
-            || state.current_to_rate != to_sample_rate
-            || state.current_channels != channels;
-
         if state.resampler.is_none()
             || state.current_from_rate != from_sample_rate
             || state.current_to_rate != to_sample_rate
@@ -85,7 +144,7 @@ impl AudioResampler {
 
         // 🚀 Processing avec le resampler
         if let Some(ref mut resampler) = state.resampler {
-            match Self::process_with_resampler(resampler, input, channels, &mut buffers) {
+            match Self::process_with_resampler_generic(resampler, input, channels, &mut buffers) {
                 Ok(output) => output,
                 Err(e) => {
                     eprintln!("❌ Erreur resampling: {}", e);
@@ -99,8 +158,8 @@ impl AudioResampler {
 
     /// Crée un resampler optimisé pour votre cas d'usage
     fn create_resampler(
-        from_rate: u32,
-        to_rate: u32,
+        from_rate: usize,
+        to_rate: usize,
         channels: usize,
     ) -> Result<SincFixedIn<f32>, Box<dyn std::error::Error>> {
         let ratio = to_rate as f64 / from_rate as f64;
@@ -126,20 +185,20 @@ impl AudioResampler {
         )?)
     }
 
-    /// Process audio avec buffers réutilisables
-    fn process_with_resampler(
+    /// Process audio générique avec buffers réutilisables
+    fn process_with_resampler_generic<T: AudioSample>(
         resampler: &mut SincFixedIn<f32>,
-        input: &[i16],
+        input: &[T],
         channels: usize,
         buffers: &mut ConversionBuffers,
-    ) -> Result<Vec<i16>, Box<dyn std::error::Error>> {
+    ) -> Result<Vec<T>, Box<dyn std::error::Error>> {
         let frames = input.len() / channels;
 
-        // 🔄 1. Conversion i16 → f32 (réutilise buffer)
+        // 🔄 1. Conversion vers f32 (utilise AudioSample trait)
         buffers.f32_buffer.clear();
-        buffers.f32_buffer.extend(input.iter().map(|&s| s as f32 / 32768.0));
+        buffers.f32_buffer.extend(input.iter().map(|sample| sample.to_f32()));
 
-        // 🔄 2. Conversion interleaved → planar (réutilise buffers)
+        // 🔄 2. Conversion interleaved → planar
         buffers.planar_input.clear();
         buffers.planar_input.resize(channels, Vec::with_capacity(frames));
 
@@ -147,30 +206,117 @@ impl AudioResampler {
             buffers.planar_input[ch].clear();
         }
 
-        for (frame_idx, frame) in buffers.f32_buffer.chunks_exact(channels).enumerate() {
+        for frame in buffers.f32_buffer.chunks_exact(channels) {
             for (ch, &sample) in frame.iter().enumerate() {
                 buffers.planar_input[ch].push(sample);
             }
         }
 
-        // 🎯 3. Resampling magique !
+        // 🎯 3. Resampling magique ! (Rubato travaille directement en f32)
         let output_planar = resampler.process(&buffers.planar_input, None)?;
 
-        // 🔄 4. Conversion planar → interleaved i16 (réutilise buffer)
+        // 🔄 4. Conversion planar → interleaved avec type générique
         let output_frames = output_planar[0].len();
-        buffers.output_i16.clear();
-        buffers.output_i16.reserve(output_frames * channels);
+        let mut output = Vec::with_capacity(output_frames * channels);
 
         for frame_idx in 0..output_frames {
             for ch in 0..channels {
-                let sample = (output_planar[ch][frame_idx] * 32767.0)
-                    .round()
-                    .clamp(-32768.0, 32767.0) as i16;
-                buffers.output_i16.push(sample);
+                let f32_sample = output_planar[ch][frame_idx];
+                // Utilise AudioSample pour reconvertir au format d'origine
+                let converted_sample = T::from_f32(f32_sample).clamp_audio();
+                output.push(converted_sample);
             }
         }
 
-        Ok(buffers.output_i16.clone())
+        Ok(output)
+    }
+
+    /// Version spécialisée pour f32 (plus efficace, évite conversions inutiles)
+    pub fn resample_f32(
+        &self,
+        input: &[f32],
+        from_sample_rate: usize,
+        to_sample_rate: usize,
+        channels: usize,
+    ) -> Vec<f32> {
+        // ✅ Pas de conversion si même sample rate
+        if from_sample_rate == to_sample_rate || input.is_empty() {
+            return input.to_vec();
+        }
+
+        let mut state = self.state.lock();
+        let mut buffers = self.conversion_buffers.lock();
+
+        // 🔄 Recrée le resampler si configuration changée
+        if state.resampler.is_none()
+            || state.current_from_rate != from_sample_rate
+            || state.current_to_rate != to_sample_rate
+            || state.current_channels != channels {
+            match Self::create_resampler(from_sample_rate, to_sample_rate, channels) {
+                Ok(new_resampler) => {
+                    state.resampler = Some(new_resampler);
+                    state.current_from_rate = from_sample_rate;
+                    state.current_to_rate = to_sample_rate;
+                    state.current_channels = channels;
+                }
+                Err(e) => {
+                    eprintln!("❌ Erreur création resampler: {}", e);
+                    return input.to_vec();
+                }
+            }
+        }
+
+        // 🚀 Processing optimisé pour f32 (pas de conversion)
+        if let Some(ref mut resampler) = state.resampler {
+            match Self::process_f32_direct(resampler, input, channels, &mut buffers) {
+                Ok(output) => output,
+                Err(e) => {
+                    eprintln!("❌ Erreur resampling f32: {}", e);
+                    input.to_vec()
+                }
+            }
+        } else {
+            input.to_vec()
+        }
+    }
+
+    /// Processing optimisé pour f32 natif (pas de conversions)
+    fn process_f32_direct(
+        resampler: &mut SincFixedIn<f32>,
+        input: &[f32],
+        channels: usize,
+        buffers: &mut ConversionBuffers,
+    ) -> Result<Vec<f32>, Box<dyn std::error::Error>> {
+        let frames = input.len() / channels;
+
+        // 🔄 1. Conversion interleaved → planar (pas de conversion de format!)
+        buffers.planar_input.clear();
+        buffers.planar_input.resize(channels, Vec::with_capacity(frames));
+
+        for ch in 0..channels {
+            buffers.planar_input[ch].clear();
+        }
+
+        for frame in input.chunks_exact(channels) {
+            for (ch, &sample) in frame.iter().enumerate() {
+                buffers.planar_input[ch].push(sample);
+            }
+        }
+
+        // 🎯 2. Resampling direct !
+        let output_planar = resampler.process(&buffers.planar_input, None)?;
+
+        // 🔄 3. Conversion planar → interleaved (pas de conversion de format!)
+        let output_frames = output_planar[0].len();
+        let mut output = Vec::with_capacity(output_frames * channels);
+
+        for frame_idx in 0..output_frames {
+            for ch in 0..channels {
+                output.push(output_planar[ch][frame_idx]);
+            }
+        }
+
+        Ok(output)
     }
 
     /// Réinitialise l'état interne (pour éviter glitches lors de changements)
@@ -182,14 +328,219 @@ impl AudioResampler {
         println!("🔄 Resampler reset");
     }
 
-    /// Version oneshot sans état (pour tests)
-    pub fn resample_oneshot(
-        input: &[i16],
-        from_rate: u32,
-        to_rate: u32,
+    /// Version oneshot générique sans état (pour tests)
+    pub fn resample_oneshot<T: AudioSample>(
+        input: &[T],
+        from_rate: usize,
+        to_rate: usize,
         channels: usize,
-    ) -> Result<Vec<i16>, Box<dyn std::error::Error>> {
+    ) -> Result<Vec<T>, Box<dyn std::error::Error>> {
         let resampler = AudioResampler::new();
         Ok(resampler.resample(input, from_rate, to_rate, channels))
     }
 }
+
+pub struct AudioTools;
+
+impl AudioTools {
+    /// Convertit un échantillon audio multi-canaux en mono (générique)
+    ///
+    /// # Arguments
+    /// * `samples` - Les échantillons audio (format interleaved)
+    /// * `channels` - Le nombre de canaux d'entrée
+    ///
+    /// # Returns
+    /// Un Vec<T> contenant les échantillons mono
+    ///
+    /// # Example
+    /// ```ignore
+    /// // Avec i16
+    ///
+    /// let stereo_i16 = vec![100i16, 200i16, 150i16, 250i16];
+    /// let mono_i16 = AudioTools::sample_to_mono(&stereo_i16, 2);
+    ///
+    /// // Avec f32
+    /// let stereo_f32 = vec![0.5f32, -0.3f32, 0.2f32, 0.8f32];
+    /// let mono_f32 = AudioTools::sample_to_mono(&stereo_f32, 2);
+    /// ```
+    pub fn sample_to_mono<T: AudioSample>(samples: &[T], channels: usize) -> Vec<T> {
+        // Si déjà mono, retourne une copie
+        if channels <= 1 {
+            return samples.to_vec();
+        }
+
+        // Calcule le nombre de frames
+        let frame_count = samples.len() / channels;
+        let mut mono_samples = Vec::with_capacity(frame_count);
+
+        // Pour chaque frame, calcule la moyenne des canaux
+        for frame_start in (0..samples.len()).step_by(channels) {
+            let frame_end = (frame_start + channels).min(samples.len());
+            let frame = &samples[frame_start..frame_end];
+
+            // Calcule la moyenne en utilisant f32 comme format intermédiaire
+            let sum: f32 = frame.iter().map(|sample| sample.to_f32()).sum();
+            let average = sum / channels as f32;
+
+            // Convertit de retour au format original et clamp
+            let mono_sample = T::from_f32(average).clamp_audio();
+            mono_samples.push(mono_sample);
+        }
+
+        mono_samples
+    }
+
+    /// Version avec stratégies de mixage (générique)
+    pub fn sample_to_mono_with_strategy<T: AudioSample>(
+        samples: &[T],
+        channels: usize,
+        strategy: MonoMixStrategy
+    ) -> Vec<T> {
+        if channels <= 1 {
+            return samples.to_vec();
+        }
+
+        let frame_count = samples.len() / channels;
+        let mut mono_samples = Vec::with_capacity(frame_count);
+
+        for frame_start in (0..samples.len()).step_by(channels) {
+            let frame_end = (frame_start + channels).min(samples.len());
+            let frame = &samples[frame_start..frame_end];
+
+            let mono_sample = match strategy {
+                MonoMixStrategy::Average => {
+                    let sum: f32 = frame.iter().map(|s| s.to_f32()).sum();
+                    let average = sum / channels as f32;
+                    T::from_f32(average).clamp_audio()
+                }
+                MonoMixStrategy::LeftChannel => frame[0],
+                MonoMixStrategy::RightChannel => {
+                    if channels > 1 { frame[1] } else { frame[0] }
+                }
+                MonoMixStrategy::Max => {
+                    let max_sample = frame.iter()
+                        .max_by(|a, b| {
+                            a.to_f32().abs().partial_cmp(&b.to_f32().abs())
+                                .unwrap_or(std::cmp::Ordering::Equal)
+                        })
+                        .unwrap_or(&frame[0]);
+                    *max_sample
+                }
+                MonoMixStrategy::Rms => {
+                    // Root Mean Square
+                    let sum_squares: f32 = frame.iter()
+                        .map(|s| {
+                            let val = s.to_f32();
+                            val * val
+                        })
+                        .sum();
+                    let rms = (sum_squares / channels as f32).sqrt();
+
+                    // Préserve le signe général
+                    let sum_sign: f32 = frame.iter().map(|s| s.to_f32()).sum();
+                    let final_value = if sum_sign >= 0.0 { rms } else { -rms };
+
+                    T::from_f32(final_value).clamp_audio()
+                }
+            };
+
+            mono_samples.push(mono_sample);
+        }
+
+        mono_samples
+    }
+
+    /// Conversion mono vers stéréo (générique)
+    pub fn mono_to_stereo<T: AudioSample>(mono_samples: &[T]) -> Vec<T> {
+        let mut stereo_data = Vec::with_capacity(mono_samples.len() * 2);
+
+        for &sample in mono_samples {
+            stereo_data.push(sample); // Canal gauche
+            stereo_data.push(sample); // Canal droit
+        }
+
+        stereo_data
+    }
+
+    /// Conversion entre formats d'échantillons
+    pub fn convert_format<From: AudioSample, To: AudioSample>(samples: &[From]) -> Vec<To> {
+        samples.iter()
+            .map(|&sample| To::from_f32(sample.to_f32()))
+            .collect()
+    }
+
+    /// Mix plusieurs frames audio ensemble (générique)
+    pub fn mix_frames<T: AudioSample>(frames: &[Vec<T>], target_size: usize) -> Vec<T> {
+        if frames.is_empty() {
+            return vec![T::zero(); target_size];
+        }
+
+        let mut mixed = vec![0.0f32; target_size];
+
+        // Mix tous les frames en f32 pour éviter les débordements
+        for frame in frames {
+            for (i, &sample) in frame.iter().enumerate() {
+                if i < target_size {
+                    mixed[i] += sample.to_f32();
+                }
+            }
+        }
+
+        let count = frames.len().max(1) as f32;
+
+        // Convertit de retour au format cible avec normalisation
+        mixed.into_iter()
+            .map(|sample| T::from_f32(sample / count).clamp_audio())
+            .collect()
+    }
+
+    /// Utilitaire pour changer le nombre de canaux
+    pub fn change_channel_count<T: AudioSample>(
+        samples: &[T],
+        from_channels: usize,
+        to_channels: usize,
+    ) -> Vec<T> {
+        match (from_channels, to_channels) {
+            (1, 2) => Self::mono_to_stereo(samples),
+            (2, 1) => Self::sample_to_mono(samples, 2),
+            (from, to) if from == to => samples.to_vec(),
+            (from, 1) => Self::sample_to_mono(samples, from),
+            (1, to) => {
+                // Mono vers multi-canaux : duplique sur tous les canaux
+                let mut result = Vec::with_capacity(samples.len() * to);
+                for &sample in samples {
+                    for _ in 0..to {
+                        result.push(sample);
+                    }
+                }
+                result
+            }
+            (from, to) => {
+                // Cas complexe : passe par mono puis étend
+                let mono = Self::sample_to_mono(samples, from);
+                Self::change_channel_count(&mono, 1, to)
+            }
+        }
+    }
+}
+
+/// Stratégies de conversion multi-canaux vers mono
+#[derive(Debug, Clone, Copy)]
+pub enum MonoMixStrategy {
+    /// Moyenne de tous les canaux (par défaut)
+    Average,
+    /// Utilise seulement le canal gauche
+    LeftChannel,
+    /// Utilise seulement le canal droit
+    RightChannel,
+    /// Prend l'échantillon avec l'amplitude maximale
+    Max,
+    /// Root Mean Square - plus précis énergétiquement
+    Rms,
+}
+
+impl Default for MonoMixStrategy {
+    fn default() -> Self {
+        Self::Average
+    }
+}