Supported Scenarios

Here are the related Stream classes with their supported operations that can be used:

Class	Read	Write	Comments
I2SStream	+	+	i2s
PWMAduioOutput		+	pwm
AnalogAudioStream	+	+	adc, dac
MemoryStream	+	+	memory
URLStream	+		url
A2DPStream	+	+	a2dp
GeneratedSoundStream	+		gen
AudioOutputWithCallback	+	+
CsvOutput		+	csv
File	+	+	From SD library
Serial, ...	+	+	Std Arduino

In theory we should be able to support the following scenarios:

Input	dac	i2s	file	a2dp	Serial	csv
adc	+	+	+	+	+	+
i2s	+	+	+	+	+	+
file	+	+	+	+	+	+
a2dp	+	+	+	-	+	+
Serial	+	+	+	+	+	+
memory	+	+	+	+	+	+
url	+	+	+	-	+	+
gen	+	+	+	+	+	+