Audio Sources and Sinks

You can read audio data from “Audio Sources” and you write them to “Audio Sinks”.

As “Audio Sources” we will have e.g.:

• Digital Microphones – I2SStream
• Analog Microphones – AnalogAudioStream
• Files on the Internet – URLStream
• Streaming Internet Radios - ICYStream
• Generated Sound – GeneratedSoundStream
• Encoded Audio - EncodedAudioStream
• Mobile Phone A2DP Bluetooth – A2DPStream
• Binary Data in Flash Memory – MemoryStream
• Audio generated by STK Framework - STKStream
• Desktop Integration - PortAudioStream MiniAudioStream StdioStream
• A Timer based Source - TimerCallbackAudioStream
• ESP32 Lyrat/AudioKit - AudioBoardStream, I2SCodecStream, (AudioKitStream)
• Input using FIR, IIR Filters - FilteredStream
• Tensorflow Lite - TfLiteAudioStream
• Converting Streams
• Communication - ESPNowStream, UDPStream
• Any other Arduino Classes implementing Streams: SD, Ethernet etc

As “Audio Sinks” we will have e.g:

• external DAC – I2SStream
• Analog output e.g. to an Amplifier – AnalogAudioStream
• Output using PWM – PWMAudioOutput
• Output using digital pins to a resistor ladder DAC - R2ROutput
• Output to SPDIF/TOSLINK - SPDIFOutput
• Encoded Audio - EncodedAudioStream
• Bluetooth Speakers – A2DPStream
• Serial to display the data as CSV – CsvOutput
• Serial to display the data as hex dump - HexDumpOutput
• Encoding and Decoding of Audio EncodedAudioStream
• Desktop Integration - PortAudioStream MiniAudioStream StdioStream
• ID3 Metadata for MP3 - MetaDataID3
• A Timer based Sink - TimerCallbackAudioStream
• ESP32 Lyrat/AudioKit - AudioBoardStream, I2SCodecStream, (AudioKitStream)
• VS1053 Codec Module - VS1053Stream
• Callback integration e.g. with ESP8266Audio AudioOutputWithCallback
• Output using FIR, IRR Filters - FilteredStream
• Determine the Volume - VolumeMeter
• Split the Output to different Destinations - MultiOutput
• 3 Band Equilizer - Equilizer3Bands
• LED Strip/Matrix - LEDOutput, LEDOutputUnoR4
• FFT - AudioRealFFT, AudioKissFFT and others
• Tensorflow Lite - TfLiteAudioStream
• Converting Streams
• Communication - ESPNowStream, UDPStream
• Multiuser-Webserver for PCM Output - AudioWAVServerEx
• Any other Arduino Classes implementing Streams: SD, Ethernet etc

Subclasses of the Arduino Print class act always as Sink. Subclasses of Arduino Stream act as Source and can usually also act as Sink.