Rockbox Technical Forums

Support and General Use => Audio Playback, Database and Playlists => Topic started by: z0rk on September 02, 2019, 06:03:56 PM

Title: Enabling equalizer generates white noise
Post by: z0rk on September 02, 2019, 06:03:56 PM

Hiya: I am running v3.14 on a Sansa Clip+. When I open an EQ preset by DiscoProJoe’s, for example, I instantly get white noise. When I create my own preset manually, save it open it, I get the same behavior so I know it's not a particular preset itself.

I saw another thread here that also reports the same behavior but it refers to an old version of Rockbox (v.3.9). The issue was resolved for the poster by updating to a nightly build (see http://forums.rockbox.org/index.php/topic,29480.msg186837.html#msg186837)

The preset I created manually uses the settings posted here (see http://forums.rockbox.org/index.php?topic=9468.0).

Thanks

Title: Re: Enabling equalizer generates white noise
Post by: saratoga on September 02, 2019, 07:33:07 PM

Post your settings file from the .rockbox folder

Title: Re: Enabling equalizer generates white noise
Post by: z0rk on September 02, 2019, 08:52:49 PM

Here it is. Thx

Title: Re: Enabling equalizer generates white noise
Post by: saratoga on September 02, 2019, 10:27:52 PM

Did you edit that file manually?  eq peak filter 4 and 5 look to have bad values (negative Q factor).  If you put those back to positive, does it work?

Title: Re: Enabling equalizer generates white noise
Post by: z0rk on September 02, 2019, 11:54:56 PM

Hey, thanks. That put me on the right track. I've modified the config.cfg as you suggested but found that my changes reverted back to the negative value until I realized that I had to modify the EQ config as well. This leads me to wonder how do I reset the EQ back to default, the unmodified settings when you enable EQ but haven't made any changes?

Thanks