Yesterday, a user was proposing an Arduino Sketch for a Guitar Effects Pedal which is mixing the original input with an effect. Setting up a simple effect is easy, but I have never thought about how to mix the effect with the original input. He was proposing the following process Read more
I was wondering if the Raperry Pico 2W can be used with my Arduino Snapclient Library. A related discussion was hinting that it is just not powerful enough. In the beginning was stuggeling quite a bit and the audio with Opus was just not working and I could bareliy make Read more
The starting point for writing audio data from USB to I2S using a Rasperry Pico (RP2040) Microcontroller is the speaker example sketch from my extended TinyUSB library. We would just do an i2s.write(data, len) in the callback: Unfortunately this did not work and this was locking up the output quite Read more
In my Arduino AudioTools project I am providing many examples that show how to distribute audio over the network. One scenario that is easy to implement, is to write the data via http post. On the server side usually one of the following options is expected: the content length and Read more
I am providing the untyped NumberFormatConverterStream class to convert between different signed bit sizes. This class is using the typed templated NumberFormatConverterStreamT do do the actual work. Currently there are also some Codecs that can also be used to convert the nubmer format: e.g. L8, L16 and Float. I decided Read more
I had the issue that the 24 bit output via A2DP was not working, but the corresponding 32 bit example was just working fine. So I decided to double check the I2S output with the help of a logical analyzer. Checking 16 bits First I was double checking how the Read more
The Readme from the AudioTools project describes how to use the logger: AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Debug); You can log to any object that is a subclass of Print and valid log level values are: Debug, Info, Warning, Error. But only few peaple realize the power behind this! So let me give you Read more
I had some open issue, that the LyraT Mini Audio Board was not working with my AudioTools and AudioDrivers library, so I was digging into this board a bit deeper. Here are the main two differences to the regular supported LyraT or AudioKit boards: It uses a ES8311 codec chip Read more
In order to test the USB functionality of the ESP32-S3, I bought the following camera/microphone board: Before testing the USB I implemented and executed the following test cases for each hardware component: Testing the user button Testing the LED Testing the Color LED Testing the SD Testing the SDMMC Testing Read more
MP3 files can contain metadata that stores information about the title, the author etc. If you send an MP3 stream with metadata to a decoder, the logic is usually resilient enough to skip this automatically. However there can be some cases where the codec can’t cope and is crashing. One Read more