- VoiceRecorder now explicitly unmutes input and sets 100% gain (24dB) after audio_stream_open_input
- Matches firmware fix c7dc66e0 BOTH complementary open + close ref-count
- Mp3Player/BookPlayer already using audio-stream for output (fixes fast playback)
- Mp3Player: sdk 0.7->0.8.0-dev, find audio-stream device, open_output with resampler (hz/ch), write via audio_stream_write, close on pause
- BookPlayer: close/open per format change via AudioStreamConfig, write via stream
- VoiceRecorder: input_handle open_input 16k/mono via audio_stream_read, output_handle open_output file rate via write/resampler
- ES8311 native 44100, old direct I2S at 16k caused 4.096MHz MCLK vs 11.29MHz -> fast playback
- Brick game correct because it uses audio-stream resampler path
- Mp3Player: increase task stack 4096->6144, prio 5->6, remove taskYIELD causing audio gaps
- VoiceRecorder: configure I2S as stereo for ES7210 (dual mic) like working MicroPython,
then downmix left channel to mono WAV to fix low-pitch mic-like recording
Adolfo