• Adobe Audition

  Is there a way to reduce static in an 8 KHz/8-bit/mono wav file?

  Posted by Patrick Haley on February 25, 2019 at 4:36 am

  Hi all, new to audio here and could use some help. I’m updating the hold music for our telephone system and it requires an 8 KHz/8-bit/mono wav file. I’ve used Audition CC to reduce the volume to -9.0 dB, I’ve converted to 8 KHz and mono without any problems. However, when I convert to 8-bit the quality diminishes considerably. I understand I will lose some quality, but is it supposed to be THIS bad? Is there something I’m missing here?

  Original mp3: https://vocaroo.com/i/s00XydI9ayqv

  8-bit wave: https://vocaroo.com/i/s10dOYN6CWGG

  Any help is greatly appreciated. Thanks!

  Chris Wright replied 7 years, 4 months ago 2 Members · 3 Replies
• 3 Replies

• 

  Chris Wright

  February 25, 2019 at 7:15 pm

  it just adds a little noise, in convert sample type, use dither gaussian and then automatic noise removal. default settings. will sound great, well, at least for 8 bit lol. if you can keep the 22khz, that’s good too.
• 

  Patrick Haley

  February 25, 2019 at 9:00 pm

  Ok, I managed to figure this out with help from a few different threads. What I was doing was converting to an 8-bit mono file, importing the wav file, running the noise reduction and then saved again as an 8-but mono file. If the file is already 8-bit/mono, just save and match the source type. I found out the KHz doesn’t really matter so I left that alone to maintain some quality. Here are my steps:

  1. Import the mp3
  2. Go to Edit > Convert to Sample Type. Set channels to mono, bit depth to 8-bit, enable dithering and set to gaussian
  3. Capture the noise print and run noise reduction using this tutorial: https://youtu.be/J433aZsNThc
  4. Export the file as a wav and choose “Same as Source for all options”

  This should maintain the quality of the export and drastically decrease the noise.

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• 

  Chris Wright

  February 25, 2019 at 10:38 pm

  did capture noise print noise reduction work better for you than automatic noise reduction? just curious.
  a really nice trick for noise reduction is choose different FFT sizes, listen for output only in multiple passes.

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