Welcome, Today I would like to release the new Dual PCM, code-named; "FlexEd" (Flexible Edition). This is an upgraded version of the original Dual PCM released in 2016. I have showcased versions of this new Dual PCM in a few videos on YouTube, unfortunately they are out of date. I showcased it's features here, this too is out of date, but it's similar to the final version. The plan was to make a tutorial on implementing it into Sonic 1, but the driver has become so complex that many routines had been rewritten, I don't think an "upgrade" is possible without headaches. I would also need a tutorial to upgrade from the previous version. So the plan has changed. Because of the complexity, I have written a manual for the driver instead (the download link for the sound driver is in the manual itself): Download PDF This is just the PCM driver though, there is no 68k driver, the manual explains how to control Dual PCM using the 68k, it is mostly for those who have a 68k driver and need a decent PCM driver to use. However, knowing many of you are not technically minded, I will at least release a version of Sonic 1 with Dual PCM implemented. Some of Sonic 1's music has been updated to play the Timpani's on the second channel, but there are also some new example music tracks I made to showcase the driver, you might have seen them in some of the YouTube videos I made? You'll also have a sound test to play with, as well as another standalone ROM built for testing Dual PCM with DMA transfers. Think of this as an "apology" for not releasing the driver sooner or supplying any form of easy guide~ Sonic 1 Test Driver Something to keep in mind!, many emulators are inaccurate, and due to inaccurate Z80 <-> 68k access timings, Dual PCM does not play at the correct pitch on many emulators, some even switching pitches extremely fast causing VHS like effects. Regen and the Gens series of emulators for example do not slow the Z80 down properly when it tries to access the window. BlastEm also has this issue, but it is mentioned in the emulators' "To-Do" list that this will be fixed, so I look forward to that~ (as luck would have it, he made a update about 3 weeks ago which resolves this issue, so there you go, move to BlastEm d=) Kega is one of the few that gets it right, but probably by accident. Bottom line, the driver was designed to sound good on hardware, and if the emulator does not emulate the timings right, it won't sound as good on the emulator, but that is unfortunately out of my hands, all I can recommend is... get a better emulator? *shrugs* --- --- --- --- --- --- --- --- Unfortunately, I don't think many will understand the power and significance this driver has, but I also don't want to oversell it either. It's not without its flaws, limitations have hit hard, but it's also not without its advances, and there is room for improvement. The one thing it does have an advantage over other drivers on, is its ability to avoid quality loss caused by DMA transfers, I've noticed many cool sound drivers being showcased in videos, but I've also noticed that they've neglected to showcase these sound drivers while a game is running in the background, one that use DMA transfers, so it paints a rather painful picture. Many sound drivers that play more than one sample neglect any sort of pitch/volume control or are 68k based. So this sound driver does have a place somewhere, unfortunately it's difficult to advertise it where its features make sense, but also without sounding like a pretentious fuck about it. As always, you'll have to make up your own mind. One thing I will say... I have rewritten this driver many times, and this latest incarnation is written carefully enough that adding a tracker system with FM and PSG playback (with the two PCM playback channels and all the features this driver has) should now be possible, and that will be my next goal. To have an entirely Z80 functional driver, with these powerful PCM playback channels. I know it'll work, but how long it'll take is another question, real life gets in the way, ya know? But I am optimistic. Anyways, if you are able to use this driver, then have fun~ (Natsumi hes released her own 68k driver here, it uses this version of Dual PCM as its PCM playback driver, so if you want another option to use Dual PCM with, that will be another for you).