The reason for 8- versus 16-bit is once again to do with steps. In 8-bit audio, there are only 255 steps from 0 to full volume, whereas in 16-bit, there are 32,767 steps, so the audio sounds much less grainy.
On Sat, 7 May 2011 01:38:01 -0400, you wrote: >This is getting way off topic, but since it started that way I guess it's >okay. >Since we can hear frequencies from 20-20KHZ, we want a sampling rate that >can reproduce all those frequencies. A sampling rate can reproduce all >frequencies up to half of it. So, a sampling rate of 8KHZ, which is what >telephones use, can only reproduce frequencies up to 4K. >So, since we want to reproduce all frequencies up to 20K, a rate of 40K at >least is required. But, we need to make some room for filters to filter >excess frequencies out. If we get over the halfway point of our sampling >rate, the higher frequencies get pushed down to lower ones, since the >sampling rate isn't high enough to represent them. So, we use a 44.1K >sampling rate to give filters some room to filter out those excess >frequencies above 20K. I don't know where they came up with that exact rate >though. >And for bits, it's sort of like midi ranges. 16 bits is going to allow more >precise control of volume than 8 will, and give a cleaner sound. Just like >128 note velocities will give you more control and smoothness than 32 or >something. > >----- Original Message ----- >From: "Alfredo The Writer of music scores" <[email protected]> >To: "QWS list" <[email protected]> >Sent: Saturday, May 07, 2011 12:49 AM >Subject: Re: QWS List off topic, audio recording > > >> Um, let me ask more about bit and Hertz. How does changing KHZ affect the >> frequency of sound. I mean, if you are at 44000 Hz, you canto hear >> anything than if you were in 8000 Hz which spuds like a phone or >> something. >> To unsubscribe or change list options, see http://lists.andrelouis.com >> >> for archived list posts, see >> http://www.mail-archive.com/[email protected] > >To unsubscribe or change list options, see http://lists.andrelouis.com > >for archived list posts, see http://www.mail-archive.com/[email protected] To unsubscribe or change list options, see http://lists.andrelouis.com for archived list posts, see http://www.mail-archive.com/[email protected]
