Ralph Glatt wrote: >mjmahon@aol.com (Michael J. Mahon) wrote in message >news:<20030914212453.24534.00000859@mb-m16.aol.com>... >> Ralph Glatt wrote: >> >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 Check out amazing quality sound for 8-bit Apples on my Home page: http://members.aol.com/MJMahon/ Michael J. Mahon wrote: > 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. Some time ago I modified DAC522 to output to the cassette port and was quite impressed with the results. I think it sounds slightly better playing through the cassette port on a IIe than it does through the headphone jack on a IIgs, though I may be imagining that ;-) > 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 ;-). So far the best results I've had is with 8-bit 11.025 KHz .wav files. The only pre-processing required is zap the file fork (if applicable) and strip the header (which I seem to think is the first 128 bytes). Another useful trick is to run the audio clip through a compressor before saving it, this is especially handy for voice samples or anything which requires good bass sound. -Simon Ned Ludd wrote: >Michael J. Mahon wrote: > >> 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. > >Some time ago I modified DAC522 to output to the cassette port and was >quite impressed with the results. I think it sounds slightly better >playing through the cassette port on a IIe than it does through the >headphone jack on a IIgs, though I may be imagining that ;-) > > >> 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 ;-). > >So far the best results I've had is with 8-bit 11.025 KHz .wav files. >The only pre-processing required is zap the file fork (if applicable) >and strip the header (which I seem to think is the first 128 bytes). >Another useful trick is to run the audio clip through a compressor >before saving it, this is especially handy for voice samples or anything >which requires good bass sound. That's the way I get sampled sounds to my Apple II, too. I don't even bother to strip the header--I use SOUND.EDITOR to trim that off. WRT low ffrequencies, they can easily take up a lot of the dynamic range of the samples, with all the higher frequencies just "riding up and down" on a high amplitude bass waveform. If you _want_ the bass, then that's just fine, but if you're going to play the sound on a small speaker, you might as well filter out much of the bass to recover more dynamic range for the higher frequencies. The loss of frequencies below 250Hz will not be noticeable with a speaker that can't reproduce them anyway, and the sound that is audible will be better. -michael Check out amazing quality sound for 8-bit Apples on my Home page: http://members.aol.com/MJMahon/