Features§
playback of multiple signals at the same time (that’s why it’s called “mixer”)
play from buffer, play from ringbuffer
record into buffer, record into ringbuffer
multichannel support
NumPy arrays with data type
'float32'
can be easily used (via the buffer protocol) as long as they are C-contiguousfixed latency playback, (close to) no jitter (optional)
to be verified …
sample-accurate playback/recording (with known offset)
to be verified …
non-blocking callback function, using PortAudio ringbuffers
all memory allocations/deallocations happen outside the audio callback
Planned Features§
meticulous reporting of overruns/underruns
loopback tests to verify correct operation and accurate latency values
fade in/out?
loop?
playlist/queue?
Out Of Scope§
reading from/writing to files (use e.g. the soundfile module)
realtime signal processing (inside the audio callback)
signal generators
multiple mixer instances (some PortAudio host APIs only support one stream at a time)
resampling (apart from what PortAudio does)
fast forward/rewind
panning/balance
audio/video synchronization