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Thread: Upsampling causes nasty audio effects

  1. #1

    Join Date
    Jun 2002
    Posts
    21

    Upsampling causes nasty audio effects

    I have a bunch of lectures recorded as .wav PCM 8Khz, 16 bit, mono files. When I try to use dBpowerAMP to upsample them (for example, to 11025Hz, 16 bit, mono), the resulting file has a nasty "tinny" (not to be confused with tiny ) quality to it. I can understand losing quality with downsampling, but I would think I could upsample without reducing sound quality. How can I safely upsample?

  2. #2
    Administrator
    Join Date
    Apr 2002
    Posts
    38,484
    Download Release 9 - and on the Configuration page enable 'Professional Frequency Conversion'

  3. #3
    Unregistered

    what goes on in Professional Frequency Conversion?

    Out of interest - I am converting a number of stereo wav files from 32000 to 44100 (to be burned to cd) - what goes on when Professional Frequency Conversion is selected converting wav to wav? Is there some algorithmn that calculates the missing samples - some kind of interpolation?

  4. #4
    Administrator
    Join Date
    Apr 2002
    Posts
    38,484
    Yes that sort of thing, but it does it much better than the standard windows one.

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