Hi Felix

Check the dsp_processor in my githup repo

https://github.com/jorgenkraghjakobsen/merus_bt

It should be straigh forward to mix in a beep - but please do a nice beep - not just 440hz sine.

No im not working in the ADF.

Hope that will give you some thing to work with.
/Jakobsen

Hi Gustavo Thanks - I took the time and hacked around with the APLL - the most low level I got was the the call to enable_apll(sdm0, sdm1 ... ) And yes you are right it can be done realtime will out audible effects - I am very happy. This will be next phase of synchronized multi channel audio stream...

Full log x40081278: call_start_cpu1 at /home/jkj/esp/esp-idf/components/esp32/cpu_start.c:286 I (0) cpu_start: App cpu up. I (459) heap_init: Initializing. RAM available for dynamic allocation: I (466) heap_init: At 3FFAFF10 len 000000F0 (0 KiB): DRAM I (472) heap_init: At 3FFB6388 len 00001C78 (7 K...

Hi No not normal at all - your LR clock should be you sample rate. I do not know of any setup that will end up with 36 Khz. If you able to connect you phone audio source over Bluetooth you will be notified on any sample rate change from the source and the resulting call to set i2s clock with the res...

Will take closer look in to you finding tonight - I need a to find a way to fine tune the APLL with out stopping the clock. Until now i just found that the APLL control looks like some IP hooked up on internal I2C - with SW interface through ESP-IDF stack. Happy to find if you work can get me furthe...

Hi Thorbjørn Hard to tell what you are doing wrong - The IDF examples are good high quality so I guess you have something not right in you hardware setup. Try to upload a picture or 2 - Make sure your ground are good grounds and your supply rails are stable. 5V from USB, 3V3 from esp32 module to you...

There are lots of good example out there that takes a http based audio stream from the internet via WIFI and output audio via I2S to a codec/audio amplifier. In case you want to use your mobile to source the audio you can use the bt audio sink examble. If you require Wifi one option is to wait for s...

Hi MooaLot Correct design practice would be control volume in as close the speaker as possible - so if your last point of control is an external DAC find out if it has a volume control to offer over I2C. If that is not the case you are back to apply you volume to you PCM sample before you pass them ...

Wau - well designed and impressive feature list

I was notified on your project yesterday.
Look forward to give it at try on my hardware as well.
Jakobsen

https://github.com/jorgenkraghjakobsen/ ... ts/libopus
Check it out here
/j