thanks for the quick info greg,

another idea i just got is soldering single switches between the cut
connections on ic 30 to get some nice effects and weird sounds.
would that make any sense

thanks for any suggestions,

max

----- Original Message -----
From: "gregory zifcak" < foleymachine@... >
To: "ms" < max_schroeder@... >; < tr-707@... >
Sent: Friday, February 27, 2004 10:26 PM
Subject: [tr-707] Re: Fw: [benders] 707 pitch mod (OT)


> hi max,
>
> sorry, i usually just check the group messages at the
> site and don't check this email address that often. i
> guess i should.
>
> the drawing looks like it should work. i'm not sure
> which caps i used, i think they say 104 on them. and
> actually, i used smaller ones for the bass and snare
> (maybe 682) because they tuned way lower than i
> needed; i think maybe they have a lower sample rate.
> the schematic i posted the link to is not what i
> worked from, just an example of the 555 oscillator in
> general. thats why my component values are different.
> it's also a matter of personal taste; if it doesn't go
> low enough for you, use a bigger capacitor. the
> ride/crash oscillator needs a bigger resistor than 1k.
> i think i used 2.7k, but that's not even quite big
> enough. i get a little bit of strange noise at the
> clockwise end of the pot.
>
> another note, the 555 scales in a linear fashion,
> which sounds exponential to our ears, so as you turn
> the pot, it sounds like it changes less at the low end
> than the high end. reverse-logarithmic pots exist, and
> would counteract this behavior, though i wouldn't know
> where to get them. another idea is to use regular
> logarithmic pots wired backwards, so that clockwise
> tunes the sounds down. if you don't care which way is
> up and which way is down this is an easy way to get a
> more even response. i might do this or i might just
> live with it the way it is. it's no big deal. it just
> means you have more room to play in the lower ranges
> than the higher.
>
> oh yeah, no you don't need to ground the pots to
> anything.
>
> greg
>
> --- ms < max_schroeder@... > wrote:
> > hi greg,
> >
> > i noticed that most of my questions were already
> > asked in the group, so i
> > know now..;-)
> >
> > but to be sure i īm doing everything correct i īve
> > attached a pattern drawing
> > with my design for a board, and it would be very
> > nice if you could check if
> > it īs correct like this, if it is, i īll put it up to
> > the groups file section.
> >
> > And one stupid newbie question - do i have to ground
> > the pots i mount in
> >
> >
> > Thanks for your help,
> >
> > regards,
> >
> > max
> >
> > ----- Original Message -----
> > From: "ms" < max_schroeder@... >
> > To: "gregory zifcak" < foleymachine@... >
> > Sent: Thursday, February 26, 2004 9:35 PM
> > Subject: Re: [benders] 707 pitch mod (OT)
> >
> >
> > > hi greg,
> > >
> > > thank you so much for your help so far.
> > >
> > > i got some other questions in the meantime..;-)
> > >
> > > according to the oscillators you wrote you think
> > you used a 0.1 uF
> > > capacitor, but the circuit drawing says it īs a
> > 0,01 uF - so i īm confused
> > > now...;-)
> > >
> > > now another couple of total newbie questions:
> > >
> > > where do you get the +5 power for the oscillators
> > from
> > >
> > > why are there two seperated ground points on the
> > oscillator
> > > is one for the power, and the other one for
> > grounding on the board
> > > or just both grounded on the board my knowledge
> > in electronics is really
> > > poor..:-(
> > > I īm asking because i want to build a single board
> > with all oscs to save
> > > space, and therefore put all ground points
> > together on the board and then
> > a
> > > single wire to the main board ground.
> > >
> > > I īm also planning a detailed documentation of the
> > modification with
> > photos,
> > > pattern drawings and written explanation, and
> > since i haven īt started yet
> > > (have to wait 2 weeks for the ne555 ics) i want to
> > be sure i īll be doing
> > > everything right....;-)
> > >
> > > Of course i īll load the documentation up to the
> > tr-707 group
> > files-section.
> > >
> > >
> > > best greets from vienna and thanks again,
> > >
> > > max
> >
>
> > ATTACHMENT part 2 image/gif name=patterndrawing.gif
>
>
>
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