View more

View more

View more

### Image of the Day Submit

IOTD | Top Screenshots

### The latest, straight to your Inbox.

Subscribe to GameDev.net Direct to receive the latest updates and exclusive content.

# Frequency

Old topic!

Guest, the last post of this topic is over 60 days old and at this point you may not reply in this topic. If you wish to continue this conversation start a new topic.

3 replies to this topic

### #1Flintlock  Members

Posted 28 April 2000 - 05:12 AM

I was wondering if someone would be able to tell me at what frequency middle c is played at, and by how much the frequency is changed every half step. From this I can make better DLS Instruments, and in the end better sounding stuff. Show me what you got

### #2Julio  Members

Posted 28 April 2000 - 05:32 AM

www.chesworth.com/pv
I don''t remeber exactly where it was, but it shouldn''t be too hard to find

### #3bcj  Members

Posted 28 April 2000 - 05:45 AM

Traditionally the A above middle C is given the frequency of 440 Hz. Every octive above doubles that freq. (ie the next highest A is 880 Hz) and every octive below halves the freq (ie the next lowest A is 220 Hz)

To find the change in each half step take the 12th root of 2 (because there are twelve half steps to an active) and that will be the change in frequency each note. I'd give it to you but I don't have a good enough calculator handy.

hope that helps
bcj

Edited by - bcj on 4/28/00 11:45:58 AM

### #4bcj  Members

Posted 28 April 2000 - 09:44 AM

The 12th root of 2 (2^(1/12)) is about 1.059463.

Multiply any frequency by that and the result will be the next half step up. I didn''t really make that clear in my last post. The difference bewteen every half step is different over the whole range of notes.

bcj

Old topic!

Guest, the last post of this topic is over 60 days old and at this point you may not reply in this topic. If you wish to continue this conversation start a new topic.