Re: [Sndobj-devel] does SndJackIO needs fixing on intel Mac?

[Victor L. <Vic...@nu...>]

Perhaps it's a matter of setting buffersizes to match. Crackling
audio is generally a sympton of some mismatch somewhere.

Victor

At 11:04 29/01/2007, sonify wrote:
>OK here's the rub: This simple  python Jack- code  works on intel Mac 
>OSX10.4.8:
>
>>import sndobj
>>
>>tab = sndobj.HarmTable()
>>osc = sndobj.Oscili(tab, 440, 16000)
>>oput = sndobj.SndJackIO('sine1')
>>oput.SetOutput(1, osc)
>>thread = sndobj.SndThread()
>>thread.AddObj(osc)
>>thread.AddObj(oput, sndobj.SNDIO_OUT)
>
>
>but
>>oput = sndobj.SndJackIO('sine1' , 1, osc)
>
>crackles audio through Jack then fails to play.
>
>
>NB Jack has a special setup routine on inte Macs.
>Form p12 of the Jack Manual
>>The Intel-based Macs present the Built-in Audio device to software 
>>applications as two
>>distinct half-duplex devices: an input device and an output device. For 
>>proper
>>functioning within Jack OS X on Intel Macs, these two devices must be
>>aggregated into a single one, using the Mac's Aggregate Device Editor, 
>>which is
>>housed within the Audio MIDI Setup application.
>
>-David
>On 28/01/2007, at 8:37 PM, Victor Lazzarini wrote:
>
>>Looks correct, but I am afraid I have not
>>tested Jack on OSX extensively. I assume your Jack
>>server is up and running.
>>
>>I'll look into the Jack thing on Monday.
>>
>>Regards
>>
>>Victor
>>
>>>
>>>Not sure if this is syntactically correct. Please check
>>>it.
>>>
>>>># PySndObj Jack example
>>>>import sndobj
>>>>import time
>>>>tab = sndobj.HarmTable()
>>>>osc = sndobj.Oscili(tab, 440, 16000)
>>>>oput = sndobj.SndJackIO('sine')
>>>>oput.SetOutput(1, osc)
>>>>
>>>># then either
>>>>thread = sndobj.SndThread()
>>>>thread.AddObj(osc)
>>>>thread.AddObj(oput, sndobj.SNDIO_OUT)
>>>>thread.ProcOn()
>>>>time.slee (5)
>>>>thread.ProcOff()
>
>
>
>
>_____________________________
>David Worrall: <mailto:so...@av...>so...@av...
>
>

Victor Lazzarini
Music Technology Laboratory
Music Department
National University of Ireland, Maynooth