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09.08.2009 02:22  Stefan Lindberg
Will the ST timer effects work if the AY8930 is on a cartridge?

07.08.2009 12:15  Lars Baumstark

gwEm - as soon as some people experiment with the new abilities of the ´30 I could make a ROMPort epxansion (this would be especially nice for those Falcon owners or people who don´t want to mod their STs). On the other hand I wouldn´t like to see too many different ways that have to be supported by new software. We´ll see what the remaining active Sceners want to have... BTW: A quality sound output could be easily added to the PCB that will contain the compatibility switch logic. How about a stereo (L: A+1/2B, R: 1/2B+C) line-out as i.e. 3.5mm or Cinch?

06.08.2009 18:43  gwEm
stefan - those are really good recordings. it seems clear that the AY is too much de-muffled compared to the YM by completely removing this capacitor. i think its pretty important to get as close as to the same as the stock sound for composing reasons. lars - what do you think about my idea to make the AY on a separate expansion cartridge?

05.08.2009 21:58  Stefan Lindberg
Also i have not modified the volume in those recordings, this is exactly how differnt they sound to each other.

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)

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!

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.

04.08.2009 05:27  Stefan Lindberg
About the volume of the recordings... i think Lars has amplified them until they reach their clipping point and as the (unmuffled) AY recording has less bass than the YM then it was possible to amplify it a lot more. I agree that the modded AY sound a bit too bright as it is now, what about putting a lower value cap there instead of removing it?

03.08.2009 21:39  gwem
i mean of course modded AY sounds a bit brighter than default YM

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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