Examples

Generate a simple 440 Hz sine wave:

sine

Generate a 220 Hz sine wave with a 880 Hz beep each second, for 5 seconds:

sine=220:4:d=5
sine=f=220:b=4:d=5
sine=frequency=220:beep_factor=4:duration=5

Generate a 1 kHz sine wave following 1602,1601,1602,1601,1602 NTSC pattern:

sine=1000:samples_per_frame='st(0,mod(n,5)); 1602-not(not(eq(ld(0),1)+eq(ld(0),3)))'

Audio Sinks

Below is a description of the currently available audio sinks.