Path: chuka.playstation.co.uk!news From: Alex Herbert Newsgroups: scee.yaroze.programming.sound Subject: Re: 2 vb and vh files? Date: Fri, 16 Oct 1998 13:44:43 +0000 Organization: PlayStation Net Yaroze (SCEE) Lines: 32 Message-ID: <36273FBB.30E0D293@ndirect.co.uk> References: <704c6f$nec10@chuka.playstation.co.uk> <362636FD.72AB44A@ndirect.co.uk> <7064lb$nec15@chuka.playstation.co.uk> <3626BA47.36234426@shell.jps.net> <707d3u$nec17@chuka.playstation.co.uk> Reply-To: aherbert@ndirect.co.uk NNTP-Posting-Host: th-usr02-51.ndirect.co.uk Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 4.04 [en] (Win95; I) Doglife wrote: > Argh.. thanks for the help, I think I am stuck... > > Huh? u mean u can change the sampling rate? I thought the converter > (wav2vag.exe) can only take in 44KHz Mono wave file? > > Doglife > You can use almost any sample rate you like. The PSX changes the sample rate depending on which note is played. If you go up an octave (12 semi-tones) the sample rate doubles, and down an octave halves the sample rate. So, a 22KHz sample needs to be played 12 semi-tones lower than a 44KHz sample to keep the same pitch/duration. You can choose the sample rate depending on the type of sound. A 44KHz sample has a frequency range of 22KHz which is what the human ear is capable of hearing. A 11KHz sample has a frequency range of 5.5KHz which may be enough for lower frequency sounds, such as bass notes. This is all well and good in theory, but in practise it doesn't work quite so well, as many lower frequency sounds do have a higher frequency harmonic content. As a result, you get quantization noise. At the end of the day it's best to experiment, but remember that bright, crisp sounds tend to need a high sample rate to sound good, and dark, dull sounds don't. Herbs