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feel free to post a note here to comment our work, find information about ym-chipmsound or discuss chipmusic in general, or whatever you like, as long as your post is not supposed to offend anybody.
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| 05.08.2009 21:56 Stefan Lindberg | |
Two recordings by me. One origianl YM setup and the other AY8930 without the cap. http://www.ym2149.com/stand_by_YM_AY_recording.zip (40 mb, FLAC) | |
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| 04.08.2009 18:53 Lars Baumstark | lars_baumstark@yahoo.de |
Another hint for the AY/YM comparison: Set the YM MP3 recording to +100% (i.e. in iTunes) - then the experience of the recordings (AY unmuffled, YM original) is quite the same! | |
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| 04.08.2009 18:48 Lars Baumstark | lars_baumstark@yahoo.de |
First of all - thanks for your action and taking part! @gwem: It´s C10 in the schematics you linked below. This cap just represents a low-pass filter (higher freq´s are suppressed). You won´t get more bass with/without it - just in the total mix of all output setting 100% amplitude is different with/without the cap. So in relation it might _seem_ that there´s less bass without the cap - in reality it´s the same absolute amount of bass frequencies, but more absolute contents of higher freuqncies (that´s what "unmuffling" is about here ;-) My hint is: Go hear it on an original system without any recording stage in between and (important!) on YOUR amplifier and loudspeakers. That´s the real thing for all comparisons... @Stefan: Of course it´s possible to find the right individual cap for everyone´s taste. Just experiment with any value between -say- 10nF to 100nF. I´m fine with no cap at the moment. As said before - try the real hardware without any additional (recording) stages in the audio path. | |
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| 03.08.2009 21:39 gwem | |
i mean of course modded AY sounds a bit brighter than default YM | |
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| 03.08.2009 21:38 gwem | |
if anything the capacitor removed version is a bit brighter. the difference between the muffled and unmuffled versions in massive. is it c10 or c8 on these schematics? http://dev-docs.atariforge.org/files/1040ST_Schematic_12-26-1987.pdf i guess c10? maybe a bit of experimentation might be nice to find a better match what is the real difference in volume between YM and AY, in these clips the AY one is alot louder, making comparison harder. | |
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| 03.08.2009 21:04 Stefan Lindberg | |
Here are the comparison recordings (with and without the cap) by Lars plus an YM recording for reference: http://www.ym2149.com/ay8930_soundexamples.zip | |
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| 03.08.2009 12:50 gwem | |
also which 100nf did you remove? i would like to look at your mod | |
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| 03.08.2009 12:45 gwEm | |
what about the idea of building the AY3930 into an external cartridge with high quality outputs for recording? i will be interested to hear the de-muffled version | |
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| 02.08.2009 19:09 Lars Baumstark | lars_baumstark@yahoo.de |
As I can (at least partly) understand the reluctance to let your precious STs be modified with a AY8930 by a rather unknown newcomer (seemingly - got my first ST in august 1985 ;-) here´s another way: I could also sell modified STs for a small fee (let´s say around EUR 60,-). With these machines all you coders and chip musicians out there can hack the AY8930 without any risk! Isn´t that a deal? I have a 1040STF (1MB, german keyboard, AY8930) to start with. Who´s gonna get it? Mail me... Currently I´m working on the 100%-compatibility switch. PAL listing is finished, ready to assemble and burn onto a test hardware, residing between the AY8930 and the YM socket in the ST. To answer some questions I received: Yes, the mod can be done to STEs as well (no matter if MSTE or 1040STE). Even TTs should be no problem - but I doubt that there´s anyone with such a machine to try?! I´ll just have to locate the "muffle" filter capacitor in each machine to get the sound right... | |
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