Greetings Steven,

various solenoid players have been around for quite a while.

the addition to a pneumatic player of electrically operated valves under MIDI
control has also been around for a while. organ valves have been used for a
while.

more recently there was the (not very successful) Powerroll that interfaced
through the tracker bar and then the system that i sold for a while and now one
made by Bob Hunt. these use smaller valves than the organ valve and can fit more
easily into a piano.

except in rare cases i think it is not very sensible to add solenoids to a
pneumatic player. it would either be a lot of extra work to keep both systems
working or the result would be a serious compromise to both systems. if you have
a crappy old PianoDisc system and a crappy old player and a bunch of time it
might be fun to try but there is going to be competition for available space for
all components. you would have better results with a Stahnke LX system as it
fits into the keybed with little overhang but it would be a waste to put it into
anything less than a stunning piano.

Saturday, July 12, 2008, 2:21:09 PM, you wrote:
> I guess what I meant was, what do people think of this as a
> technique for converting a pneumatic player to play midi files, is
> this a good technique? The only ways I had heard of before were to
> affix something to the tracker bar and to tap into the tubes in the
> back so putting solenoids underneath the keys was new to me (show
> how much I know about the topic). Does anyone have pictures of such a
conversion?

> --Steve


> On 7/12/08 4:01 PM, "Bob Meyer" <poway_bob@...> wrote:


>

> I'm not sure what you mean by "What do you make of this?" This is
> how solenoid players are installed. It does seem a little odd to be putting it
on a pneumatic player.
>
> Bob Meyer

>
>
>
>
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