Tweak audio quality!

[Guest hardcore]

Hi all,

I've found these registry settings on Microsoft's MSDN:

http://msdn.microsoft.com/library/default....lockdrivers.asp

Software Mixer

[HKEY_LOCAL_MACHINEAudioSoftwareMixer]    "SampleRate"=dword:AC44

    "Buffers"=dword:4

    "BufferSize"=dword:800

    "EnableLowPassFilter"=dword:1

    "Priority 256"=dword:dc

The SampleRate registry value specifies the sample rate, measured in samples per second, that the software mixer will use when opening the audio device. The default is 0xAC44, which is equivalent to 44100 in decimal.

The Buffers registry value specifies the number of buffers used in the software mixer audio stream. The default is 4.

The BufferSize registry value specifies the size, measured in bytes, of the buffers used in the software mixer audio stream. The default is 0x800, which is equivalent to 2048 in decimal.

The EnableLowPassFilter registry value controls whether the software mixer applies a low pass filter when conducting sample rate conversion. This improves audio quality at the expense of the CPU overhead. The default is 1, which means the low pass filter is enabled.

The Priority 256 registry value specifies the thread priority at which the software mixer will run.

They control the quality and mixing rate of the software audio mixer. I have tried adding the following registry keys:

<wap-provisioningdoc>


   <characteristic type="Registry">


      <characteristic type="HKLMAudioSoftwareMixer">


         <parm name="SampleRate" value="44100" datatype="integer" />


         <parm name="EnableLowPassFilter" value="1" datatype="integer" />


      </characteristic>


   </characteristic>


</wap-provisioningdoc>

MS says these are the default settings, but in my phone the registry keys were absent.

After applying the keys, it seems to have improved the audio quality somewhat. (although I can't really be sure, it might be a placebo effect... :D) Supposedly the CPU drain is also slightly more... but if you use your phone as an MP3 player like me, it might be worth it.

This is something to try if you dont mind playing around with your phone.

Also, does anybody happen to know which hardware audio CODEC is used in the HTC Voyager? I'm wondering if it's an AC'97 CODEC (48khz) or another one?

[Guest Cybertronic]

Are there any settings for more bass? :D