Apparently-To: john.smith@gravis.com


GUS Programmer's Digest     Mon, 21 Feb 94  4:26         Volume 9: Issue  12  

Today's Topics:
                          GUS D/A converter
                    GUS Programmer's Digest V9 #11
                               Pitch...

Standard Info:
	- Meta-info about the GUS can be found at the end of the Digest.
	- Before you ask a question, please READ THE FAQ.

----------------------------------------------------------------------

Date: 21 Feb 94 11:03:00 MET
From: "VISX80::GRECNER" <GRECNER%VISX80.decnet@musx53.zfe.siemens.de>
Subject: GUS D/A converter

Does anyone know how many bits does GUS's A/D converter use ?
For the full 32 16-bit voices it needs 21 bits in fact. Since it's
only 14 voices in the best quality, it still needs at least 20 bits.
I know that in proffesional devices (synths) they normally use 
24-bit internal signal processing and 18-bit output A/D converters.
So, how is it with GUS ? Does it utilize 16 bit ADC only ? How is
then polyphonie implemented ? I'm asking because i find my new GUS
not dynamic enough (when compared to Ensoniq EPS-16 +, for example,
which is a proffesional 16 bit sampler with 20 voices ).
Thanks for comments.


					Martin Grecner

------------------------------

Date: Mon, 21 Feb 1994 04:15:58 -0700 (MST)
From: "Shawn T. Rutledge" <rutledge@enuxsa.eas.asu.edu>
Subject: Re: GUS Programmer's Digest V9 #11

> Well, the formula, as I understand it, is:
> 
>   freq+halfstep = freq * 2^(1/12) or halfstep=e^(1/12 * ln(2))
> 
> But I think you are wrong about A being 400 Hz.  By the above formula:
> 
> This puts C at 237.842Hz.  I was always under the impression that A was
> 440Hz.  Using the above formula, that makes:

Quite right.  Brain fart I guess.  Thanks for the formula though!  I don't think
I'd seen it before.

-- 
  _______                                                             KB7PWD
 (_  | |_)                                            shawn.rutledge@asu.edu
 __) | | \__________________________________________________________________
* packet * sci fi * freedom of information * IEEE * cyberspace * anti-Macintosh * 

------------------------------

Date: Sun, 20 Feb 1994 17:36:17 +0800 (PST)
From: Francis Li <fli@nermal.santarosa.edu>
Subject: Pitch...

Thank you to all who responded about my inquiry of sample frequency and
pitch...

------------------------------

End of GUS Programmer's Digest V9 #12
*************************************

To post to tomorrow's digest:                    <gus-sdk@dsd.es.com>
To (un)subscribe or get help:            <gus-sdk-request@dsd.es.com>
To contact a human (last resort):          <gus-sdk-owner@dsd.es.com>

FTP Sites              Archive                       Directories
---------              -------                       -----------
Main N.American Site:  archive.orst.edu              pub/packages/gravis
                       wuarchive.wustl.edu           systems/ibmpc/ultrasound
Main Asian Site:       nctuccca.edu.tw               PC/ultrasound
European Callers ONLY: theoris.rz.uni-konstanz.de    pub/sound/gus
Submissions:           archive.epas.utoronto.ca      pub/pc/ultrasound/submit
Newly Validated Files: archive.epas.utoronto.ca      pub/pc/ultrasound
Mirrors:               garbo.uwasa.fi                mirror/ultrasound
 
MailServer For Archive Access: Email to <mail-server@nike.rz.uni-konstanz.de>

Hints:
      - Get the FAQ from the FTP sites or the request server.
      - Mail to <gus-sdk-request@dsd.es.com> for info about other GUS
	related mailing lists (general use, musician's, etc.).



