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lvqcl
QUOTE(maiki @ Feb 6 2008, 17:01) *

I have tested UDIAL.WAV encoded into 320 kbps MP3 [...]
distorted = I can hear cracking (clipping?) AT ANY VOLUME LEVEL
What is going on here?

This clipping is the result of encoding into MP3, nothing with your hardware.
Download LAME 3.97 and encode UDIAL.WAV as

"lame.exe -b 320 -k udial.wav udial.mp3"
nonreality
Just thinking about how many people might have accidentally left this in their library over the years and had it come on when listening to random music with the sound cranked up. ohmy.gif
WonderSlug
Hello all. New member and decided to respond to this thread with my first post. biggrin.gif

Anyway, I downloaded the original APE file in the first post and tested it on my system.

Here is my setup:

Windows XP SP2
Creative Soundblaster Live! PCI Value
DirectX 9.0c

All Windows XP Updates as of February 2008 except for DirectX (I don't have DX10 installed yet). I also have the latest drivers I could get for all my hardware.


Software Media Player: XMPlay 3.4.2.1 (by Un4Seen Developments) with Monkey Audio Plugin (xm-ape.dll)

using Output Device: DirectSound - SB Live! Audio [D000] with 16-bit stereo.

Also, using a set of "average" on-the-ear headphones plugged into the SB Live! They are "average" because I spent just $25 on them. So I guess they are "mainstream consumer" headphones. They are rated at 16 Ohm impedance and frequency range 20 - 22000 Hz with a SNR of 98 dB.

I turned off all reverb/chorus/equalizer and any other DSP effects in XMPlay. I also set the main WIndows Mixer volume to 50% with Wave volume to 100%. Within XMPlay I set the volume slider to 10% and then moved it up slowly until I reached a light comfortable listening level which was achieved at 30%.

With the regular non-altered 44100 Hz output, I get the starting 3 "beeps" of touch tone dialing and then a really high pitched razzing noise, like a ray gun firing or alien spaceship, that overpowers the rest of the beeps.

However, if I tell XMPlay to resample to 48000 Hz, that razzing noise goes away and I get only the touch tones, which I presume is the 'correct' sound.


If this is correct, then XMPlay's resampling to 48000Hz for Creative cards works very well. Before this test, I have always had XMPlay resample all sounds to 48000 Hz before outputting to the sound device because I had already read about the subpar upsampling that many Creative cards do.


My motherboard also has a built-in C-Media Wave AC'97 sound device, but I rarely use that thing so I didn't test it.
krabapple
The old links to udial.flac don't work, so I'm rehosting the file (I converted this to flac from the .ape file, whose link still does work)


udial.flac
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