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- The GUS Programmer's Digest Sunday, 18 June 1995 Volume 20 : Number 011
-
- Today's Topics:
- Re: Simultaneous
-
- 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.
-
- ----------------------------------------------------------------------
-
- From: Francois Dion <francois@hyperreal.com>
- Date: Sat, 17 Jun 1995 11:41:01 -0700 (PDT)
- Subject: Re: Simultaneous
-
- Dans la Matrice, The GUS Programmer's Digest a dit:
- >
- > From: houghton@WHIRL.SPEECH.CS.CMU.EDU
- > Date: Tue, 13 Jun 95 15:27:28 EDT
- > Subject: Simultaneous record/play looping problem
- >
- > I have the reference sheets for the chipset and I know it is supposed
- > to be possible to turn off this feature, however it is possible that
- > Gravis hardwired this. (Why I don't know.) Before I purchased this
-
- It is impossible to hardwire anything to disable the loopback function
- on the CS4231. So yes, as it's possible to do it on the CS4231, it's
- possible to do it on the Gravis Ultrasound Max. If you have the regular
- GUS, then you'll need to modify it with my jumper specs on the gus
- archive sites.
-
- This function is called the digital loopback. All that is needed in your
- application is to prevent the ADC data going directly to the DAC (and not
- the other way around like you said. Just disable the digiatl loopback, and
- you'll be done. This is accomplished by puttin a 0 in the LBE bit of the
- Loopback Control Register (I13). You also have the possibility of simply
- attenuating this value with the other bits in the I13 register.
-
- If i remember correctly, base address is for teh indirect registers (like
- I13) for the first 5 bits while the 6th bit must be set. base +1 is for
- the value. In the case of I13, the lsb is the enable/disable, second bit
- is unused and the others are the attenuation, where 0= 0dB attenuation
- and 63=94,5dB attenuation.
-
- Hope this helps.
-
- Ciao,
- - --
- Francois Dion (IdMEDIA) [> Email: francois@hyperreal.com <]
- ' [> C.P. 278, St-Lambert, QC, Canada, J4P 2N8 <]
- [> Raving Up North Ezine: run-request@hyperreal.com, subject: help <]
-
- ------------------------------
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- End of The GUS Programmer's Digest V20 #11
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