Playing a Synthesizer to a Bluetooth Speaker using a Raspberry PI Zero

I was asking myself if I can use a headless Raspberry PI Zero together with a MIDI keyboard as simple Synthesizer which sends the sound via A2DP to a Bluetooth Speaker. So technically speaking I wanted to set up my PI as a2dp source. Installation Initially I tried to do the setup with Pulseaudio. However it seems that there are plenty of issues with this option, so I decided to use ALSA instead and removed Read more…

By pschatzmann, ago

The Synthesis ToolKit (STK) Library for the Arduino ESP32 – Bluetooth Support

I made the Synthesis ToolKit (SKT) available as Arduino Library. The Synthesis ToolKit in C++ (STK) is a set of open source audio signal processing and algorithmic synthesis classes written in the C++ programming language. STK was designed to facilitate rapid development of music synthesis and audio processing software, with an emphasis on cross-platform functionality, realtime control, ease of use, and educational example code. I have demonstrated the MIDI Bluetooth functionality where we can receive Read more…

By pschatzmann, ago

The Synthesis ToolKit (STK) Library for Arduino – Lessens Learned

Overview The Synthesis ToolKit in C++ (STK) is a set of open source audio signal processing and algorithmic synthesis classes written in the C++ programming language. You can find further information in the original Readme of the STK Project Like many other sound libraries it originates from an University (Princeton) and can look back at a very long history: it was created in 1995. In the 90s the computers had limited processor power and memory Read more…

By pschatzmann, ago

The Synthesis ToolKit (STK) Library for Arduino – Running on a Nano,

I made the Synthesis ToolKit (SKT) available as Arduino Library. The Synthesis ToolKit in C++ (STK) is a set of open source audio signal processing and algorithmic synthesis classes written in the C++ programming language. STK was designed to facilitate rapid development of music synthesis and audio processing software, with an emphasis on cross-platform functionality, realtime control, ease of use, and educational example code. Today I was investigating if the library can be used on Read more…

By pschatzmann, ago

The Synthesis ToolKit (STK) Library for the Arduino ESP32 – Supporting MIDI and BLE

I made the Synthesis ToolKit (SKT) available as Arduino Library. The Synthesis ToolKit in C++ (STK) is a set of open source audio signal processing and algorithmic synthesis classes written in the C++ programming language. STK was designed to facilitate rapid development of music synthesis and audio processing software, with an emphasis on cross-platform functionality, realtime control, ease of use, and educational example code. Standard STK uses Skini instead of MIDI. This is a simple Read more…

By pschatzmann, ago

The Synthesis Toolkit (STK) Library for the Arduino ESP32 – Getting rid of Files

I made the Synthesis ToolKit (SKT) available as Arduino Library. The Synthesis ToolKit in C++ (STK) is a set of open source audio signal processing and algorithmic synthesis classes written in the C++ programming language. STK was designed to facilitate rapid development of music synthesis and audio processing software, with an emphasis on cross-platform functionality, realtime control, ease of use, and educational example code. One of the challenges using Microcontrollers is, that you usually don’t Read more…

By pschatzmann, ago

The Synthesis ToolKit (STK) Library for the Arduino ESP32 – An Introduction

I made the Synthesis ToolKit (SKT) available as Arduino Library. The Synthesis ToolKit in C++ (STK) is a set of open source audio signal processing and algorithmic synthesis classes written in the C++ programming language. STK was designed to facilitate rapid development of music synthesis and audio processing software, with an emphasis on cross-platform functionality, realtime control, ease of use, and educational example code. The information below is based on the original STK tutorial but Read more…

By pschatzmann, ago

Sending Sound from an ESP32 to a Bluetooth Sink (e.g. Bluetooth Speaker)

A couple of months ago, I described how you can use my Arduino A2DP library to receive music with an ESP32 via Bluetooth e.g. from a mobile phone. I have extended the library and implemented the BluetoothA2DPSource class that you can use to to the opposite and send sound data from an ESP32 to a Bluetooth Receiver: #include “BluetoothA2DPSource.h” #include <math.h> BluetoothA2DPSource a2dp_source; void setup() { a2dp_source.start(“MyMusic”, get_sound_data); } void loop() { } That’s pretty Read more…

By pschatzmann, ago

A Simple Arduino Mavlink Drone Library for QGroundControl

I was looking for an easy to implement solution to control my RC Airplane (that is using a ESP32 micro controller) with the help of a Mobile Application. I decided to use QGroundControl which is based on Mavlink. My project provides the following features: It is available as Arduino Library (which should work on any architecture) you can easily overwrite any method if you desire a different behavoir A simple extendable parameter store is provided, Read more…

By pschatzmann, ago

My Spektrum Satellite Library has been released

I proudly announce that my Spektrum Satellite Arduino Library has been released with the version 1.0.0 on Github: It features: A Complete Implementation of Official Specification Support for binding using different BindModes Support for receiving and sending of data Input and output are handled via Streams. So you can use it with Serial, Bluetooth, UDP etc…. Support of automatic scaling of channel values (using different data types) Automatic handling of 1024 and 2048 servo data Read more…

By pschatzmann, ago