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More => Old Versions => Media Center 12 (Development Ended) => Topic started by: soundcheck on December 10, 2006, 02:46:39 pm

Title: 48kHz base material touched by MC?
Post by: soundcheck on December 10, 2006, 02:46:39 pm

Hi there.

I am playing 48kHz sampled files.
I assume that these are not touched by MC as long as the DSP is switched off.
I know from past discussions that e.g. 44.1 won't be touched at all if the DSP is switched off.

Perhaps somebody can confirm this.

Cheers

Title: Re: 48kHz base material touched by MC?
Post by: Alex B on December 10, 2006, 03:19:05 pm

I can confirm. I just tested it.

I played a 48 kHz wave file through MC's audio engine using MC's diskwriter output mode.

I compared the files with foobar's bit-compare tool:

Quote

Comparing:
"D:\Rip\48 kHz test file.wav"
"E:\Test\Disk Writer Output.wav"
No differences in decoded data found.

Title: Re: 48kHz base material touched by MC?
Post by: soundcheck on December 11, 2006, 03:51:47 am

THX a lot. Alex.
I was just curious about the stream getting resampled or manipulated again. I didn't expect it since my DSP is switched off.

Background: "Realtime" up-or resampling might impact the sound quality. I am just testing offline upsampling with a professional
upsampler.  I am upsampling from 44,1 to 48khz and play the 48khz files . The first results are really promising.

THX for confirming it.

Title: Re: 48kHz base material touched by MC?
Post by: Alex B on December 11, 2006, 05:56:17 pm

Quote from: soundcheck on December 11, 2006, 03:51:47 am

Background: "Realtime" up-or resampling might impact the sound quality. I am just testing offline upsampling with a professional upsampler.  I am upsampling from 44,1 to 48khz and play the 48khz files . The first results are really promising.

Actually, MC's on the fly DSP resampler is one of the best available. MC uses Shibatch's SSRC code. It should be good enough for any listening purposes if sample rate conversion is needed for some reason.

Title: Re: 48kHz base material touched by MC?
Post by: soundcheck on December 12, 2006, 01:28:54 am

Alex.

I am upsampling with Voxengo R8brain Pro to 48kHz.

48kHz are giving me a much better performance on my external USB DAC than 44,1kHz.

I'll compare your internal-realtime sampler with my offline upsampler, That's for sure.  ;)

Cheers

Title: Re: 48kHz base material touched by MC?
Post by: JONCAT on December 12, 2006, 07:45:01 am

Alex, care to comment here?

http://yabb.jriver.com/interact/index.php?topic=37644.0

v/r
DC