[PD-dev] [ pure-data-Bugs-1561839 ] rhythmic glitching on PowerBook G4
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Tue Nov 28 02:42:56 CET 2006
Bugs item #1561839, was opened at 2006-09-20 03:31
Message generated for change (Comment added) made by inklaar
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Category: puredata
Group: v0.40.0
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Hans-Christoph Steiner (eighthave)
Assigned to: Nobody/Anonymous (nobody)
Summary: rhythmic glitching on PowerBook G4
Initial Comment:
On an Apple PowerBook G4 1.67GHz running 10.4.7, the
sound always had a pulsing glitch on it no matter if
any sound was being generated or not. When I switched
the output sampling rate to 48000, the glitching went
away. When I switched back to 44100, the glitching
came back.
I saw this one other time on a PowerBook, but it was
also happening to Audacity. This time it was only
happening for Pd. My guess is that its related to
portaudio.
This was on a student's laptop, so I can't test again.
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Comment By: Fred Inklaar (inklaar)
Date: 2006-11-28 02:42
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This bug is present in all versions I tested above Pd version
0.38.4-extended-RC8.
The highest version I tested was Pd version 0.40-2 on:
Computernaam: PowerBook G4 15"
Computermodel: PowerBook5,8
Processortype: PowerPC G4 (1.5)
Aantal processors: 1
Processorsnelheid: 1.67 GHz
L2-cache (per processor): 512 KB
Geheugen: 1 GB
Bussnelheid: 167 MHz
Opstart-ROM-versie: 4.9.6f0
With the following audio card specs:
Ingebouwde geluidskaart:
Apparaten:
Crystal Semiconductor CS84xx:
Ingangen en uitgangen:
Digitale S/PDIF-invoer:
Hoorbaar: Ja
Plugincode: Topaz
Burr Brown PCM3052:
Ingangen en uitgangen:
Interne microfoon:
Regelaars: Geluid uit, Master
Hoorbaar: Nee
Plugincode: Onyx
Lijnniveau-ingang:
Regelaars: Geluid uit, Master
Hoorbaar: Nee
Plugincode: Onyx
Digitale S/PDIF-uitvoer:
Regelaars: Geluid uit
Plugincode: Onyx
Interne luidsprekers:
Regelaars: Geluid uit, Links, Rechts
Plugincode: Onyx
Lijnniveau-uitgang:
Regelaars: Geluid uit, Links, Rechts
Plugincode: Onyx
The pulsing glitch is present when the audio card is set to the following
frequencies (by using the Audio/Midi-configuratie Utility), all on
16-bit:
44100 Hz
88200 Hz (faster pulse)
96000 Hz (even faster pulse)
The glitch is not present when the audio card is set to:
32000 Hz
48000 Hz
64000 Hz
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Comment By: IOhannes m zmölnig (zmoelnig)
Date: 2006-10-11 09:22
Message:
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user_id=564396
experienced something similar on a G4 iBook (of a student,
so don't ask for details...) with an RME fireface.
this only happened with pd-extended (if i only knew the
version...0.38, 0.39??), running vanilla pd-0.39-2 did solve
the problem.
the test was the "test audio and midi" sinewaves.
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