There are couple of options implemented in the ESP-ADF to modify contents of an audio stream:
- Combine contents of two audio streams using :doc:`downmix`
- Apply ten band :doc:`equalizer`
- Change audio sampling frequency and convert between single and two channel with :doc:`filter_resample`
- Modify pitch and speed of the stream using :doc:`audio_sonic`
Please refer to description of respective APIs below.
.. toctree::
:caption: In This Section
:maxdepth: 1
Downmix <downmix>
Equalizer <equalizer>
Resample Filter <filter_resample>
Sonic <audio_sonic>