Re: sound volume on IIe

[mjmahon@aol.com (Michael J. Mahon)]

Ralph Glatt wrote:

>mjmahon@aol.com (Michael J. Mahon) wrote in message
>news:<20030914212453.24534.00000859@mb-m16.aol.com>...
>> Ralph Glatt wrote:

<snip>

>> >The IIc also has volume control. ;-) Unfortunately, the sound
>> >digitizing software that I have requires the cassette in/out, which
>> >the IIc doesn't have.
>> 
>> Ralph, perhaps you can find the (probably few) places where
>> the software references the cassette output and patch it to
>> reference the speaker location, instead.
>> 
>> Input is a bit more difficult, since the //c doesn't have the
>> cassette input signal conditioning circuits.  You would need
>> an external amplifier to drive a transistor to switch a pushbutton
>> input (and the corresponding software patch to change the
>> cassette input sampling to the pushbutton input).
>
>In case you haven't guessed, the software I'm talking about is
>SoftDAC. I think I can still get sound out of it, but not record. I
>recall there being some company in India that made it possible to
>digitize sound through the game port, but I was kind of leery of
>dealing with them. I do have a //e, so if I really want, I can use
>that to record.

Hmm, must not be _my_ "SoftDAC" (DAC522), since it outputs
through the speaker.  ;-)

It should not be hard to search for references to the cassette
port $C020 and switch it/them to the speaker $C030.  I used
to have both options in DAC511, but then it only took one
POKE to change.  With DAC522, there are 32 speaker
references that would need to be changed, and space was
tight, so the stock version works only with the speaker.

Yes, I remember the Indian company and their sound digitizer.
It was simply a 1-bit digitizer, like the cassette input, so you
aren't missing much.  ;-)

Do give it a try on the //e to see what you think of it.  Some
sounds/voices sound moderately intelligible, but the result is
still "infinitely clipped", so don't expect too much.

The advantage of 1-bit sound is that 8 samples fit in a single
byte, so the sounds are pretty compact for their length.  The
downside is that it sounds terrible compared to even 5-bit
sampled sound (shameless plug  ;-).

-michael

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