Panning ignored by Mixer?

[jelling]

I can pan audio fine when not using the mixer but when I add the panned audio into the Mixer the panning is lost. Is this supposed to work or do I misunderstand when/how to use the mixer?

from pyo import *

s = Server().boot()
s.start()

# Setup Mixer
mm = Mixer(outs=2, chnls=1)

# Load Files
path = "/Users/jelling/dev/performa/server/audio" 

# Play files - works
# speech = SfPlayer(path + "/gettysburg10.wav", loop=True, mul=.2).out(0)
# band = SfPlayer(path + "/CantinaBand60.wav", loop=True, mul=.2).out(1)

# Play files and pan without mixer - works
# speech = SfPlayer(path + "/gettysburg10.wav", loop=True, mul=.2)
# band = SfPlayer(path + "/CantinaBand60.wav", loop=True, mul=.2)

# speechPanned = Pan(speech,2,.5).out() # pan to center
# bandPanned = Pan(band,2,0,.5).out(1) # pan to center

# Play via mixer - works
# speech = SfPlayer(path + "/gettysburg10.wav", loop=True, mul=.2)
# band = SfPlayer(path + "/CantinaBand60.wav", loop=True, mul=.2)

# mm.addInput(0, speech.out())
# mm.addInput(1, band.out(1))

# Play panned files via mixer - panning to center has no effect
speech = SfPlayer(path + "/gettysburg10.wav", loop=True, mul=.2)
band = SfPlayer(path + "/CantinaBand60.wav", loop=True, mul=.2)

# Center pan does not take effect
speechPanned = Pan(speech, 1, 0.5)
bandPanned = Pan(band, 1, 0.5)

# Exposed pan controls in gui - moving controls still has no effect
speechPanned.ctrl()
bandPanned.ctrl()

mm.addInput(1, speechPanned.out(0))
mm.addInput(0, bandPanned.out(1))

s.gui(locals())

[stripwax]

Does it work if you initialise the mixer with channels=2 instead of channels=1 ?

On Mon, 18 May 2020, 19:31 Jon Elling, notifications@github.com wrote:

I can pan audio fine when not using the mixer but when I add the panned audio into the Mixer the panning is lost. Is this supposed to work or do I misunderstand when/how to use the mixer?

from pyo import *

s = Server().boot() s.start()

Setup Mixer

mm = Mixer(outs=2, chnls=1)

Load Files

path = "/Users/jelling/dev/performa/server/audio"

Play files - works

speech = SfPlayer(path + "/gettysburg10.wav", loop=True, mul=.2).out(0)

band = SfPlayer(path + "/CantinaBand60.wav", loop=True, mul=.2).out(1)

Play files and pan without mixer - works

speech = SfPlayer(path + "/gettysburg10.wav", loop=True, mul=.2)

band = SfPlayer(path + "/CantinaBand60.wav", loop=True, mul=.2)

speechPanned = Pan(speech,2,.5).out() # pan to center

bandPanned = Pan(band,2,0,.5).out(1) # pan to center

Play via mixer - works

speech = SfPlayer(path + "/gettysburg10.wav", loop=True, mul=.2)

band = SfPlayer(path + "/CantinaBand60.wav", loop=True, mul=.2)

mm.addInput(0, speech.out())

mm.addInput(1, band.out(1))

Play panned files via mixer - panning to center has no effect

speech = SfPlayer(path + "/gettysburg10.wav", loop=True, mul=.2) band = SfPlayer(path + "/CantinaBand60.wav", loop=True, mul=.2)

Center pan does not take effect

speechPanned = Pan(speech, 1, 0.5) bandPanned = Pan(band, 1, 0.5)

Exposed pan controls in gui - moving controls still has no effect

speechPanned.ctrl() bandPanned.ctrl()

mm.addInput(1, speechPanned.out(0)) mm.addInput(0, bandPanned.out(1))

s.gui(locals())

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[jelling]

No it does not

[belangeo]

Hi,

On Mon, May 18, 2020 at 2:31 PM Jon Elling notifications@github.com wrote:

I can pan audio fine when not using the mixer but when I add the panned audio into the Mixer the panning is lost. Is this supposed to work or do I misunderstand when/how to use the mixer?

from pyo import *

s = Server().boot() s.start()

Setup Mixer

mm = Mixer(outs=2, chnls=1)

Load Files

path = "/Users/jelling/dev/performa/server/audio"

Play files - works

speech = SfPlayer(path + "/gettysburg10.wav", loop=True, mul=.2).out(0)

band = SfPlayer(path + "/CantinaBand60.wav", loop=True, mul=.2).out(1)

Play files and pan without mixer - works

speech = SfPlayer(path + "/gettysburg10.wav", loop=True, mul=.2)

band = SfPlayer(path + "/CantinaBand60.wav", loop=True, mul=.2)

speechPanned = Pan(speech,2,.5).out() # pan to center

bandPanned = Pan(band,2,0,.5).out(1) # pan to center

This is not panned to center, it's full left (Pan(band, outs=2, pan=0, spread=0.5) # spread does nothing in stereo.

Play via mixer - works

speech = SfPlayer(path + "/gettysburg10.wav", loop=True, mul=.2)

band = SfPlayer(path + "/CantinaBand60.wav", loop=True, mul=.2)

mm.addInput(0, speech.out())

mm.addInput(1, band.out(1))

You don't play via Mixer, you send the signals to the audio outputs with .out() and .out(1). The signals are added to the Mixer but the Mixer's outputs are not used.

Play panned files via mixer - panning to center has no effect

speech = SfPlayer(path + "/gettysburg10.wav", loop=True, mul=.2) band = SfPlayer(path + "/CantinaBand60.wav", loop=True, mul=.2)

Center pan does not take effect

speechPanned = Pan(speech, 1, 0.5) bandPanned = Pan(band, 1, 0.5)

This is not center pan either... With outs=1, it's a simple thru (only one signal stream).

Exposed pan controls in gui - moving controls still has no effect

speechPanned.ctrl() bandPanned.ctrl()

For the very same reason!

mm.addInput(1, speechPanned.out(0)) mm.addInput(0, bandPanned.out(1))

Same as before, Mixer's outputs are not used, signals are sent the the soundcard with the calls .out() and .out(1).

Olivier

s.gui(locals())

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[jelling]

@belangeo thank you for the detailed response. Two remaining questions:

• center and close panning work in the code below but not hard panning. what am i missing?
• is it necessary to set the volume for each channel individually or is there a convenience method for setting both at once?

# Play panned files via mixer

# Center both - works
# speechPanned = Pan(speech, 2,pan=0.5)
# bandPanned = Pan(band, 2, pan=0.5)

# tighter panning - works
# speechPanned = Pan(speech, 2,pan=0.2)
# bandPanned = Pan(band, 2, pan=0.8)

# hard panned -  only speech is heard
speechPanned = Pan(speech, 2,pan=0)
bandPanned = Pan(band, 2, pan=1)

mm.addInput(0, speechPanned)
mm.addInput(1, bandPanned)

# Had to set volume for each channel for each input
# is there a one-line way of doing this? not a big deal if not
mm.setAmp(0,0,3)
mm.setAmp(0,1,3)

mm.setAmp(1,0,3)
mm.setAmp(1,1,3)

mm.out() 

[jelling]

On further examination, the panning above may not be working for 0.2 or 0.5. I suspect the .setAmp command is overwriting the effect of the panning. Is that true? If so, could I trouble you for a simple example of how to properly pan with the mixer? I don't hear anything unless I use setAmp to set volume.

[belangeo]

Have you set the Mixer's number of channels per output to 2 (chnls argument) ? This is working as expected:

mm = Mixer(outs=2, chnls=2)

speech = Sine(2000, mul=Sine(4).range(0, 0.3))
band = Sine(1000, mul=Sine(8).range(0, 0.3))

# hard panned -  only speech is heard
speechPanned = Pan(speech, 2,pan=0)
bandPanned = Pan(band, 2, pan=1)

mm.addInput(0, speechPanned)
mm.addInput(1, bandPanned)

# Had to set volume for each channel for each input
# is there a one-line way of doing this? not a big deal if not
mm.setAmp(0,0,3)
mm.setAmp(0,1,3)

mm.setAmp(1,0,3)
mm.setAmp(1,1,3)

mm.out() 

[belangeo]

Closing as i don't think there is anything to fix here.