🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: net.micro.atari8
Article #383

Question About POKEY's Audio Output.

#383
From: paul van de graaf
Date: Wed, 27 Aug 1986 10:28
21 lines
1566 bytes
	I'm working on a music editor written in Action!, and I'm having a
little trouble at getting the full frequency range out of POKEY.

	For individual notes, there's no problem.  All I have to do is clock
the audio channels at the high rate (1.78 megahertz?) for the high notes, and
the low rate (64 kilohertz?) for the low ones.  One of the bits in AUDCTL takes
care of this.

	The problem comes when I want to play a low note and a high note 
simultaneously.  Since there's only one clock for all of the audio channels,
it seems that you can't do this.  Yet AMS II from the now defunct APEX
collection appears to handle this just fine with all four voices.  Does anyone
know how the author did it?  I suppose I could disassemble it and figuire it
out what he did, but maybe somebody can save me from this fate.  I hope he
didn't resort to volume only sound...

As they say, thanks in advance...

Paul van de Graaf	sdcsvax!sdcc12!wa60	"I may not be strong, but I'm
@ U. C. San Diego       wa60%sdcc12@ucsd.arpa    wiry!"  - Grover the Monster.
Technical Details
Message-ID: <664@sdcc12.UUCP>
Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!nbires!hao!hplabs!hp-sdd!ncr-sd!sdcsvax!sdcc6!sdcc12!wa60

Show Full Headers
Complete Article Headers
Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!nbires!hao!hplabs!hp-sdd!ncr-sd!sdcsvax!sdcc6!sdcc12!wa60
From: wa60@sdcc12.UUCP (paul van de graaf)
Newsgroups: net.micro.atari8
Subject: Question About POKEY's Audio Output.
Message-ID: <664@sdcc12.UUCP>
Date: Wed, 27-Aug-86 06:28:42 EDT
Article-I.D.: sdcc12.664
Posted: Wed Aug 27 06:28:42 1986
Date-Received: Thu, 28-Aug-86 09:20:46 EDT
Organization: U.C. San Diego, Academic Computer Center
Lines: 21