Better Sound on W-ZERO3

Instructions on how to edit Registry and improve sound quality on the W-Zero3.

1. Using your Registry Editor, go to HKEY_LOCAL_MACHINE\Drivers\Builtin\CODEC_GSM610.
2. Find gsm610.acm key and rename it to gsm610.dll.
3. Go to HKEY_LOCAL_MACHINE\Audio\SoftwareMixer, find SampleRate key or create it if not exists with the following value: 0000AC44.
4. Still there, create if not exists EnableLowPassFilter key with value 00000001.
5. Soft reset your device. After restart, you should hear much better sound quality (more noticeable on headphones, of course).

Original link: http://bbb96.exblog.jp/6508259/