MiSTer FPGA Forum

80sArcadeKid

I consider myself pretty versed in this game. (11 killscreens & 1 million point player) so I figure I'm speaking from a pretty experienced level when talking about the sound and gameplay. I personally haven't found any input issues at all. I've not played the MiSTer core as much as real PCBs. The person who reported that bug (Matt Tecchio - 1.2...

80sArcadeKid

I have a MiSTer cab sitting next to my Donkey Kong cab both with similar 8ohm arcade speakers. I hit the start button and joystick right at the same time then one at a time and I can tell you that the melody of the music and the run sound timing is identical to untrained ears like mine. I’ve played on dozens of DK arcade machines and the general so...

80sArcadeKid

The music is perfect (I think), has that 'bell' sound of the PCB which is why I thought it was samples. I reckon the walk is just a matter of time until prefect too. Such great progress and a long time coming. Love it.

80sArcadeKid

The digital sound update is so much better than it was, especially for the digital/sampled music. I take it the samples from MAME were used or new samples captured. Great work. However, running sound is almost 100% the main (remaining) issue. With "Samples" it's a very odd non-modulating/repeating sound that changes pitch and is very 'hig...

80sArcadeKid

Yeah I’m finding out the hard way that there are a lot of cores that simply won’t allow me to map P2 Start, even though those coin + start dips are off on Mistercade. For example some older arcade games with just 2 buttons will let me map the extra 6 buttons on my candy to coin etc, but the P2 Start is locked out for mapping in the core even though...

80sArcadeKid

I’m not sure if it’s just me or a combination of main menu controller setup and MiSTercade, but I have a hellish time with conflicting or non-mapable buttons. So I get that the ‘virtual Dpad setup thing in the main menu is suppose to be the ‘base’ setting for all cores, and then you can modify per core. But it never seems to play nice. I wish there...

80sArcadeKid

Analogue audio reproduction seems to be one of the most common issues with FPGA arcade cores. I find it a little odd that it doesn't get more focus/interest. I reckon it's gonna take a very dedicated developer to create some kind of "analogue sound simulation tool" where you can recreate then simulate analogue circuits. Then the FPGA hard...

80sArcadeKid

Checking in 2 months later
Anybody got updates on the Donkey Kong soudn issues? I know there was a few parties in this thread interested in doing the analouge sound simulaiton.

80sArcadeKid

I check in here every now and then to see if the Rygar sprite sync issue (@nullobject) or the Donkey Kong sound issues have been further investigated.
I don't really care that much myself as I have both original PCBs but I'd really love MiSTer and the cores to not stop at 97% done. ( made up value )

80sArcadeKid

Super glad you find it a challenge to help with the sound fixes! So are you intending to try fix all the sounds? Not just the walk? I wish you a good challenge and hope you can do it! :D While you are there maybe you can fix the default draw mode in the core, for some reason it is flipped like pleyr one is sitting on a cocktail cab in player two sp...

80sArcadeKid

This is a very small issue. I have 4 DK PCBs. They’re all slightly different, but I’ve replaced just about every component in the analog section of one (chasing a bug) and, while the sounds changed, it was more component to component variation than age related variations. 20% spec variation over several components will add up. That being said, I b...

80sArcadeKid

sorry submitted previous early by accident The side-edge connector on of the TKG4 board has two audio outputs: Monitor out (brown path) and Speaker out (not colored, right next to the brown path), I think the monitor out path is normally connected (for upright cabinets ?, controlled by switch SW2). This signal is again connected to another amplifi...

80sArcadeKid

I downloaded the Arcade-DonkeyKong_20220429.rbf that jopdorp created, the walk is different, definetly not as pitchy but still not really equivilant. Looped twice. Both with the 2khz LPF on. https://youtu.be/9cQT34x7lxY I notice that the jopdorp rbf mutes the over games sound as well (kinda like MAME) but not sure why? I had to reset and record twi...

80sArcadeKid

I think thorr is on the right path here, each analog generated sound needs to be filtered?/simulated? rather than a holistic filter over the top of it all. I did a recording with the LPF 2khz 1st filter and it made very little difference to the underlying tone issue, sounds similar to the internal default setting but does take a slight overall edge...

80sArcadeKid

None of the Mister sounds sound anything like the PCB. Also, the musical notes on the Mister are not short notes that stop, before the next note is played. On the Mister, the notes are just one long note that lasts until the next note is played. Listen to the PCB "Start Jingle" at 0:26, and keep listening to hear the Mister version, tota...

80sArcadeKid

Ok one last video, I'll stop I promise I just want to make it clear and easy for whomever may try to fix it. FPGA sound increased by 6db to play at the same level. In general the PCB has a deeper more resonating sound, the FPGA is 'tinny' and higher pitched. https://youtu.be/fKtifT8Nexg Intro (Kong Climb) Jingle - Very similar except the high pitch...

80sArcadeKid

Sorry I’m incorrect on the jump s, low level ttl work was done and it is accurate listening to them PCB then FPGA (will a little off pitch), it’s just there is so much going on differently around it. From discord chat it seems this stuff is possible to fix just a lot of work and knowhow on what TTL circuits (correct terminology?) are for what sound...

80sArcadeKid

aberu wrote: ↑Mon Oct 31, 2022 4:04 am The pitch is off to the jingle on MiSTer it sounds like.

It’s a lot more than just in the jingle, it’s off everywhere. Running, jumps, hammer hits, music. I do wonder if it’s a simple incorrect resistor/capacitor assignment the code (not that i know how that works.)

80sArcadeKid

One last comparision to round this off, this time PCB v MAME, even though the MAME sound is quite a bit duller, the general tone is near identical. We want this on FPGA but with a nice crisp sound (maybe it was my PC settings for sound in MAME). Thanks for watching y'all, hope this helps.

80sArcadeKid

So glad you asked for this, although some sounds are a little closer all the same issues are there.

Hopefully it can help some smart person fix the problem?

80sArcadeKid

If you have an original PCB, a comparison between that and MiSTer would be more meaningful; MAME should not be used as a reference at a detailed level (though it is often useful for broad, high-level things). Sure I can do that, this was quicker to capture. I have a direct capture card (Mr Video) on the PCB so will do that today. As a player that ...

80sArcadeKid

The sound is not fixed. I've investigated this more with a MAME v FPGA comparison video. I own an original PCB and MAME is definitely similar in sound to the PCB whereas Mister is off in lots of places. https://youtu.be/PCD7DFL4Bek I also think that maybe the rom version is off? Old versions of MAME had very red girders like the FPGA implementation...

80sArcadeKid

Wave wrote: ↑Thu Jul 14, 2022 5:48 am Interesting. Are the gfx/sound issues documented anywhere?

Once again months later, I come back to check if anyone has worked on the core but alas it is not fixed.
The issues have been logged on github here back in January 2021:
https://github.com/MiSTer-devel/Arcade- ... r/issues/8

80sArcadeKid

I enjoyed that. Thanks for making it. :) By the way, I think I know the answer to this, but does the MiSTer feel identical to the real arcade board? If you did a blind test could you tell the difference? Wow, I'm almost a year behind on this reply as I don't frequent this forum often unless I'm after specific information or have something to share...

80sArcadeKid

Hey MiSTer's! I've done a playthrough of the Rygar core (from start to finish) for the Arcade Wars I'm involved with. It's a bit of a tutorial so if you were interested in learning about the game and some of it's secrets. https://www.twitch.tv/videos/1226598434 You will also see the glitches that appear on Round (level) 1 with the red death head. (...

80sArcadeKid

Really feels like a missing peice of the ambition of the MiSTer project to accuratley record old PCB hardware. So going by my interpretation of this conversation, we would need a new FPGA/FPAA platform (or analog hardware addon?) to really achieve 100% accuracy on both the digital and analog aspects of a PCB. In the meantime doing what software emu...

80sArcadeKid

Although I want it fixed, I don't particularly like the idea of modifying a core (using wav's) to fix a sound issue, even if the original implementation did it. I'd rather a core be implemented 100% correctly true to original hardware and have a solution outside the core. For example, I'm curious to see if the audio coming out of the MiSTercade (wh...

80sArcadeKid

I've been wanting this sound fix since I got my MiSTers. I'd contribute to a direct fix. A shame when games are so close to being perfect then development goes into hiatus.

[Edit - an even more worthwhile inve$tment would be someone looking at analog audio in general for the sake of many old games. Def something I'd back]

80sArcadeKid

OK.. weird as I;ve always had to use composite sync before but setting it to 0 fixed it.
composite_sync=0

80sArcadeKid

I'm using the default ini from the MiSTer repro with composite sync on:
composite_sync=1
vsync_adjust=0

I'm using the i/O board VGA out into a JPAC. These cores have been fine previously.

I did try vsync_adjust=1 but seem to make no difference, I could try 2 I guess?

MiSTer FPGA Forum

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