Vintage Simmons Drums (UK) Users Group

--- In Simmons_Drums@yahoogroups.com, "pinnhead70" <pinnhead70@...> wrote:

>
> Hello everybody!
>
> I got 2 sds7's recently and I really want to customize the eproms with my own sounds, quite experimental, maybe I will try different sounds and erase them until I get the kit I am looking for in the 24 cards.

Dead easy. Get some samples, trim them until they are 8192 or 16384 samples long (get creative with resampling and editing) depending on whether you want to burn a 27C64 or 27C128, then convert the resulting sample to 8-bit unsigned and blow it into a blank EPROM.

--
Gordonjcp MM0YEQ

And... my old faithful standard comment: Try 2nd hand proms before
erasing them. Maniac sounds can occur - lots of great stuff can be heard
when you force a synt to play a program intended for a scanner etc.

--
electronically yours, jesper

- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se


gordonjcp skrev 2012-05-22 18:36:

> --- In Simmons_Drums@yahoogroups.com
> <mailto:Simmons_Drums%40yahoogroups.com>, "pinnhead70" <pinnhead70@...>
> wrote:
> >
> > Hello everybody!
> >
> > I got 2 sds7's recently and I really want to customize the eproms
> with my own sounds, quite experimental, maybe I will try different
> sounds and erase them until I get the kit I am looking for in the 24 cards.
>
> Dead easy. Get some samples, trim them until they are 8192 or 16384
> samples long (get creative with resampling and editing) depending on
> whether you want to burn a 27C64 or 27C128, then convert the resulting
> sample to 8-bit unsigned and blow it into a blank EPROM.
>
> --
> Gordonjcp MM0YEQ

Yes, you can do it like this.

But if you want to make it a little bit petty, you can do some simple things:

Always look for 7F or 80 (HEX) as last byte. This is "analogue" zero meaning no DC offset. Otherwise you will later have a pop at the end of the sound.

Mostly you will have a 16bit, 44.1khz stereo sample as basic. Transferring a sample to 8 bit will have always a loss in quality, mostly a loss in trebles.You can enhance or eq your sample in an editor like Steinberg Wavelab. Attention: By saving the sample then (8bit, 25khz,mono) the Wavelab adds the windows header. You can remove it later with your editing software which came along with your prommer.

It will be pioneer work. Some samples will have aliasing noise while fading away: Enhance the start impact noise and eq the rest duller. Compress your sample to make it strong. Normalise it.

Always fade out and remove DC offset, with the Steinberg or other editor. If you sample is too short, fill the rest up with "7F"s, meaning silence.

Good luck!

----- Original Message -----
From: gordonjcp
To: Simmons_Drums@yahoogroups.com
Sent: Tuesday, May 22, 2012 6:36 PM
Subject: [Simmons Drums] Re: How To Burn Eproms for SDS-7 / SDS-1



--- In Simmons_Drums@yahoogroups.com, "pinnhead70" <pinnhead70@...> wrote:
>
> Hello everybody!
>
> I got 2 sds7's recently and I really want to customize the eproms with my own sounds, quite experimental, maybe I will try different sounds and erase them until I get the kit I am looking for in the 24 cards.

Dead easy. Get some samples, trim them until they are 8192 or 16384 samples long (get creative with resampling and editing) depending on whether you want to burn a 27C64 or 27C128, then convert the resulting sample to 8-bit unsigned and blow it into a blank EPROM.

--
Gordonjcp MM0YEQ





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