CSDK-2774 daily-python: fix audio renderer remix and resampling

Author: aconchillo

CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to the **daily-python** SDK will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- Fixed an audio renderer issue that would cause garbled audio if remote audio
+  was stereo.
+
 ## [0.19.0] - 2025-05-23
 
 ### Added

daily.pyi

@@ -217,7 +217,7 @@ class CallClient:
         participant_id: str,
         callback: Callable[[str, AudioData, str], None],
         audio_source: str = "microphone",
-        sample_rate: int = 0,
+        sample_rate: int = 16000,
         callback_interval_ms: int = 20,
     ) -> None: ...
     def set_video_renderer(

src/call_client.rs

@@ -1657,9 +1657,9 @@ impl PyCallClient {
     /// :param str participant_id: The ID of the participant to receive audio from
     /// :param func callback: A callback to be called when audio data is available. It receives three arguments: the participant ID, the :class:`AudioData` and the audio source
     /// :param str audio_source: The audio source of the remote participant to receive (e.g. `microphone`, `screenAudio` or a custom track name)
-    /// :param str sample_rate: The sample rate the audio should be resampled to. If 0 is given it means no resampling needed
+    /// :param str sample_rate: The sample rate the audio should be resampled to
     /// :param str callback_interval_ms: How often the callback should be called (multiple of 10ms)
-    #[pyo3(signature = (participant_id, callback, audio_source = "microphone", sample_rate = 0, callback_interval_ms = 20))]
+    #[pyo3(signature = (participant_id, callback, audio_source = "microphone", sample_rate = 16000, callback_interval_ms = 20))]
     pub fn set_audio_renderer(
         &self,
         participant_id: &str,