wvr VS esp-adf

I use klm8g1getf. It’s 8GB and about $5 from LCSC, easyEDA has the footprint and symbol. I run mine at 52mhz, 4-line mode. I’m able to playback 20 stereo wavs at once @44.1k 16bit. Writing is a lot slower but 8 should be possible. I wrote my own flat file system to prioritize speed, all the standard file systems will slow you down a lot, as far as I could find, sequential reads and writes are much faster, and most file systems don’t do that. https://github.com/marchingband/wvr/blob/main/src/emmc.c

https://github.com/marchingband/wvr/blob/main/src/boot.cpp This uses eMMC which is very similar to SD.

I have some stock! if you want one just HMU! More info here : https://github.com/marchingband/wvr

If you're getting started, the ESP8266Audio library makes it easy to play audio with the Arduino toolchain. For more advanced use cases, Espressif's own ESP-ADF has a lot of useful features and examples.

Take a look at the ESP-ADF recording example. https://github.com/espressif/esp-adf/tree/master/examples/recorder/pipeline_recording_to_sdcard

Sorry to break it to you, but the Korvo-2 is an ESP32-S3 based board and does not have classic Bluetooth (only Bluetooth LE). The a2dp+hfp example only works on the original ESP32 boards. See this table: https://github.com/espressif/esp-adf/tree/master/examples

I'm mainly looking for a direction toward a library that may assist in my project, or whether I need to do all this from scratch. Is esp-adf (https://github.com/espressif/esp-adf) something I should be looking at, is it relevant to the parts I'm using?

Example code https://github.com/espressif/esp-adf/tree/master/examples/player/pipeline_a2dp_sink_stream this is technically making a headphone with remote control but you can still use it as a starting point.

Espressif has an example for the esp32. I’m sure you could use it as a starting point to build what you need.