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Re: Chorus chip on DX27s / PCB of DX100/DX27?


 

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On 26/05/2020 10:17, Martin Tarenskeen wrote:
Interesting. I knew the DX21 has a simple Chorus effect, but I didn't realize the (rare) DX27S also has a Chorus effect, unlike the DX27 and DX100.

Rare? Then I must have been lucky, got it for very little money. It also has a port for a foot volume controller.


I have SysEx dumps from the 8x24=192 factory presets in the DX27/DX100 ROM, I have analysed them, and none of them have the CHORUS effect bit enabled in the VCED/VMEM data. I have also analyzed the 4x32=128 factory presets, and 14 of them have CHORUS switched on in the preset factory data:

Intruiging. I have just checked it on my DX27s, and at least

BellsBells
Cheeky

have the chorus set to "on".


So now I am wondering: does the DX27S have the exact same factory ROM presets as the DX100 and DX27, without CHORUS effect applied by default to any of the presets? Or do some presets have this Chorus effect switched on by default to use the DX27S chorus effect?

According to the documentation, a DX27 will not dump a voice as chorus=on. I guess (but I haven't read out the ROM) that the presets are all the same, but DX27/100 will only dump them according to their capabilities. But that is just from the standpoint that it would be quite an unnecessary effort to create different voice roms.

Cheers, Florian


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