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#1 Impulse Tracker 2.14 sampling rate.

closed-later
nobody
None
2
2001-05-09
2001-03-13
Anonymous
No

Running IT 2.14 at the default sampling rate (45454
Hz) causes the music to be played back slightly
slower. The cause may be that VDMSound is running at
44100 Hz, but IT is feeding the sound out at 45454
Hz. A good fix is to run IT with "it /s5 /m37037" to
force the sampling rate to 37037 Hz, which runs just
fine (I tried 40000 Hz, but the music played FASTER!)

Discussion

  • Vlad ROMASCANU

    Vlad ROMASCANU - 2001-03-18
    • assigned_to: nobody --> vladr
    • status: open --> open-later
     
  • Vlad ROMASCANU

    Vlad ROMASCANU - 2001-03-18
    • labels: 105964 --> 317509
     
  • Vlad ROMASCANU

    Vlad ROMASCANU - 2001-04-05

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    user_id=148964

    Be more flexible with the allowable sample rates, and find
    a compromise between the maximum supported by the SB
    (45.5kHz) and the mximum supported by the Windows audio
    driver (use waveoutGetCapabilities()). A 3.2% difference
    (44.1 vs. 45.5) should, however, not have been noticeable --
    strange.

     
  • Vlad ROMASCANU

    Vlad ROMASCANU - 2001-04-05
    • milestone: 103271 -->
    • labels: 317509 -->
    • priority: 5 --> 2
    • assigned_to: vladr --> nobody
     
  • Vlad ROMASCANU

    Vlad ROMASCANU - 2001-05-09

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    user_id=148964

    Since v2.0.3 VDMSound no longer imposes a limit on the
    sampling rate. Some audio drivers will not, however, like
    the non-standard sampling rate IT sets when in SB16 mode,
    and while some will work fine others will suffer severe
    performance and quality loss, or will simply refuse to open
    the device. Specifying /m44100 will still not open the
    device at 44100Hz, you actually have to specify a much
    lower value (/m44000 also tries to open the device at a
    sample rate superiour to 44100Hz!). You can also fix the
    sampling rate (and the rest of the audio format) from
    VDMS.INI using the forceXXX debug parameters.

    Vlad.

     
  • Vlad ROMASCANU

    Vlad ROMASCANU - 2001-05-09
    • status: open-later --> closed-later
     

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