[sdiy] Roland's cross mod and metal sync

[Tom Wiltshire]

It’s the Metal Sync that I think is the most efficient. Given the DCO architecture, it’s basically free (it cost them one NAND gate in the hardware).

I don’t understand why they took that feature away in the JX-8P, especially as it looks like the hardware can do it, but I see no mention in the user manual. Has anyone done a processor upgrade for the JX-8P yet? Tell them to put Meta Sync back in!

Tom

==================
       Electric Druid
Synth & Stompbox DIY
==================

> On 27 Aug 2019, at 18:46, Chris McDowell <declareupdate at gmail.com> wrote:
> 
> This is a great writeup, Tom. I spent a long train ride in Japan reading about this very thing. Their economy in the design of these features is interesting, too! In the case of the JX8P,I think I remember it was a single BJT that muted the DCO. Very cheap "cross-mod" indeed. 
> 
> Chris McDowell
> 
> 
> 
> 
> 
>> On Aug 27, 2019, at 9:58 AM, Tom Wiltshire <tom at electricdruid.net> wrote:
>> 
>> I mentioned the other day that I was working on article about Roland’s "cross modulation” and “metal sync” and what they really are.
>> 
>> It turns out there are three different generations of Roland synths that each use the “Cross mod” terminology differently. Only the second generation DCO-based instruments have the Metal Sync feature. Full details here:
>> 
>> https://electricdruid.net/roland-cross-mod-metal-sync/
>> 
>> Any corrections, comments, or feedback are always appreciated. I’ve only just got this into a reasonable condition, so I don’t suppose it’s perfect just yet!
>> 
>> Thanks,
>> Tom
>> 
>> ==================
>>       Electric Druid
>> Synth & Stompbox DIY
>> ==================
>> 
>> 
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