Author Topic: Snes “jr” and MSU-1 audio  (Read 3799 times)

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Offline Tzakiel

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Snes “jr” and MSU-1 audio
« on: February 12, 2018, 08:06 AM »
I recently got a snes New model (“jr”) and have noticed that the MSU audio sounds terrible compared to my old “regular” snes. Is this a known issue? I am testing with the Zelda ALTTP MSU version

Offline Relikk

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Re: Snes “jr” and MSU-1 audio
« Reply #1 on: February 12, 2018, 11:18 AM »
What do you mean by "terrible"? Is it distorted? Muffled? Tinny?

Offline Tzakiel

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Re: Snes “jr” and MSU-1 audio
« Reply #2 on: February 12, 2018, 03:52 PM »
It sounds overdriven and distorted. Same Sd2snes in my older snes sounds fine.
« Last Edit: February 12, 2018, 04:47 PM by Tzakiel »

Offline ikari_01

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Re: Snes “jr” and MSU-1 audio
« Reply #3 on: February 12, 2018, 05:13 PM »
I'm not sure about the audio input on jr consoles but I'd assume that they use 300 Ohm load resistors just as on the previous models... otherwise they would sacrifice Super Gameboy compatibility.
Do you have access to a Super Gameboy to check that the audio input on your jr is working properly? (Only pay attention to the actual Gameboy sound, not the menu sound effects)

Offline Relikk

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Re: Snes “jr” and MSU-1 audio
« Reply #4 on: February 12, 2018, 05:55 PM »
If you have one of the older revisions and have needed to use the audio boost option in the menu, then maybe that could be the cause. If you have a Rev. H then disregard.

Offline Tzakiel

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Re: Snes “jr” and MSU-1 audio
« Reply #5 on: February 12, 2018, 06:26 PM »
Audio boost is/was off.

I don’t have a super gameboy. However I could probably borrow one to test. In the meantime, does anyone else have a jr snes and the MSU audio sounds right on it?

Offline dreimer

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Re: Snes “jr” and MSU-1 audio
« Reply #6 on: February 12, 2018, 10:35 PM »
I do. USA version (50/60 Hz switch) and my main system. I tested all my MSU games on it and used it to create the DKC2 pack, so, nope all fine.

Offline Tzakiel

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Re: Snes “jr” and MSU-1 audio
« Reply #7 on: February 13, 2018, 03:47 AM »
That’s so strange. I wonder what could be causing this. I’ll try putting more MSU games on the card and seeing if it’s universal to my Jr or if it’s related to Zelda.

Offline Tzakiel

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Re: Snes “jr” and MSU-1 audio
« Reply #8 on: February 13, 2018, 05:19 AM »
I should add my snes Jr is RGB modded with a bypass chip and had resistors added to rgb lines for brightness- does that matter?

Offline Tzakiel

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Re: Snes “jr” and MSU-1 audio
« Reply #9 on: February 13, 2018, 09:05 PM »
An update. I tried a super game boy and it sounds fine to me, though tbh game boy music in general is pretty hard edged. I also tried other MSU-1 games and to my surprise they sound fine. So it’s something with the Zelda MSU the Jr doesn’t like.

Offline iwasaperson

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Re: Snes “jr” and MSU-1 audio
« Reply #10 on: February 13, 2018, 10:40 PM »
Many MSU-1 audio packs had their audio boosted in order to compensate for the lower audio levels in older SD2SNESs (Rev F and below). You need to download a new pack that works well with the newer versions of the SD2SNES or higan (as they have the same MSU-1 audio levels).
@Syboxez on Discord and some other places as well.