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More SIMM problems - Protozoa ROM causing distortion on other ROMs

More SIMM problems - Protozoa ROM causing distortion on other ROMs

2012-05-10 by retroillumination

Hi folks,

I was just reading the recent ROM list / SIMM issues post, and I wondered if anyone could shed some light on this problem.

Using an XL-7 with os 2.00. Pressing the audition button shows these ROM ID's:

MSB:O14 Xtreme lead - displays 'XL-7'
MSB:005 Protozoa - 'P/123'
MSB:017 Composer - 'PROM1'
MSB:065 Techno Synth CY - 'TeCnO'

I can get the checksums from those ROMs later if that's any help. 

All ROMs pass the diagnostic. The problem is - the sounds of the Protozoa cause a terrible distortion with some of the sounds of the other ROMs. The Protozoa sounds fine on its own. The other 3 roms play just fine together. 

It's a shame because the Protozoa is full of great sounds.

Even when the individual track volume levels are turned right down, this distortion kicks in. When you bring in a Protozoa sound, it  plays, but it turns the sound from the other ROMs into a very extreme type of distortion.

Has anyone had any similar experiences, or any ideas?

I did once have a Composer ROM that failed its diagnostic with a 'bad block' message. This ROM used to make crackling noises, kind of very similar to a scratched vinyl, on its drum presets. It was quite subtle. But this with the Protozoa is far from subtle!

Thanks!
Matt

Re: [xl7] More SIMM problems - Protozoa ROM causing distortion on other ROMs

2012-05-10 by Bruno

Hi Matt,

2012/5/10 retroillumination <retroillumination@...>:
> Using an XL-7 with os 2.00. Pressing the audition button shows these ROM ID's:
>
> MSB:O14 Xtreme lead - displays 'XL-7'
> MSB:005 Protozoa - 'P/123'
> MSB:017 Composer - 'PROM1'
> MSB:065 Techno Synth CY - 'TeCnO'
>
> I can get the checksums from those ROMs later if that's any help.
>
> All ROMs pass the diagnostic. The problem is - the sounds of the Protozoa cause a terrible distortion with some of the sounds of the other ROMs. The Protozoa sounds fine on its own. The other 3 roms play just fine together.

I have XL-7 with the same OS, Protozoa & Composer, with MROM & XROM
though (the "later" versions of MP-7/XL-7 ROMs, respectively). I will
try to create some basic presets to see if the same thing happens.

Bruno

Re: More SIMM problems - Protozoa ROM causing distortion on other ROMs

2012-05-10 by retroillumination

Hey Bruno,

Thank you! This happens with the standard presets anyway - I will try to get an example of two presets that don't play well together, one from the Composer ROM and one from Protozoa. 

Thanks for looking into this!

Matt

--- In xl7@yahoogroups.com, Bruno <brunorc@...> wrote:
Show quoted textHide quoted text
>
> Hi Matt,
> 
> 2012/5/10 retroillumination <retroillumination@...>:
> > Using an XL-7 with os 2.00. Pressing the audition button shows these ROM ID's:
> >
> > MSB:O14 Xtreme lead - displays 'XL-7'
> > MSB:005 Protozoa - 'P/123'
> > MSB:017 Composer - 'PROM1'
> > MSB:065 Techno Synth CY - 'TeCnO'
> >
> > I can get the checksums from those ROMs later if that's any help.
> >
> > All ROMs pass the diagnostic. The problem is - the sounds of the Protozoa cause a terrible distortion with some of the sounds of the other ROMs. The Protozoa sounds fine on its own. The other 3 roms play just fine together.
> 
> I have XL-7 with the same OS, Protozoa & Composer, with MROM & XROM
> though (the "later" versions of MP-7/XL-7 ROMs, respectively). I will
> try to create some basic presets to see if the same thing happens.
> 
> Bruno
>

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