18 Aug
2003
18 Aug
'03
3:34 p.m.
Hello all,
I've been asked by an animatronics technician for suggestions as how
they might go about solving a particular problem with a robot parrot
at a local theme park.
The robot's voice feature was designed around a PC/Windows platform
using Cool Edit Pro and scripted in Visual Basic. The idea is that
you say something to the parrot, it pitch shifts your voice then
repeats what you said two seconds later. If no-one talks to the
parrot for a while, it says "hello, my name is Sancho, talk to me".
Needless to say, they are having severe reliability problems with
Windows as it is being used day in, day out.
Can anyone suggest a suitable Linux solution for this parrot? I was
thinking about ecasound combined with a pitch shift plugin, if one
exists. If the solution could run entirely in RAM (CD booting,
perhaps?) then that would solve the problem of hard disk reliability.
Thanks
Daniel
18 Aug
18 Aug
4:21 p.m.
On Sat, 2003-08-16 at 10:59, Daniel James wrote:
Can anyone suggest a suitable Linux solution for this
parrot? I was
thinking about ecasound combined with a pitch shift plugin, if one
exists. If the solution could run entirely in RAM (CD booting,
perhaps?) then that would solve the problem of hard disk reliability.
I would recommend programming a custom solution using Pure Data (PD).
You can use RAM buffers for the recording and playback. PD has an
internal timekeeping system so you can set a timeout for the default
messages. PD is cool because it's a graphical language based on boxes
and patch cords, so you don't need to memorize very much syntax.
http://www.pure-data.org
4:43 p.m.
Saturday 16 August 2003 16:59 skrev Daniel James:
Hello all,
I've been asked by an animatronics technician for suggestions as how
they might go about solving a particular problem with a robot parrot
at a local theme park.
Oh, nice, I went to a zoo with my children once, they had a parrot just like
that, they thought it was immensely funny :).
The robot's voice feature was designed around a PC/Windows platform
using Cool Edit Pro and scripted in Visual Basic. The idea is that
you say something to the parrot, it pitch shifts your voice then
repeats what you said two seconds later. If no-one talks to the
parrot for a while, it says "hello, my name is Sancho, talk to me".
Needless to say, they are having severe reliability problems with
Windows as it is being used day in, day out.
Can anyone suggest a suitable Linux solution for this parrot? I was
thinking about ecasound combined with a pitch shift plugin, if one
exists. If the solution could run entirely in RAM (CD booting,
perhaps?) then that would solve the problem of hard disk reliability.
Any of the shelf distro would probably suffice. For reliability I would
propose using a Flash disk. fast, small, clean, reliable, inexpensive.
There are heaps of small, cheap motherboards these days that have built in
sound so that won't be a problem.
As for solutions to the actual problem...
I'm not entirely sure...
You'd want to 'sniff' the data continuously at the same time as you loop it
around and pitchshift it to the output...
It would probably be easiest to do a small c program which utilized some
ladspa plugins for the pitchshift, probably noise gate and, possibly the
delay.
I'm having a hard time figuring out how to do it with off the shelf tools
though, since it involves doing several things in parallell.. .
But there is probably some obvious way that I'm ignoring :)
Btw, It's always nice with real life applications of open source tools!
/Robert
6:43 p.m.
Cool project :)
On Mon, Aug 18, 2003 at 08:29:44PM +0200, Robert Jonsson wrote:
Flash disks wear out much quicker than HD's do. I would go with a normal
IDE HD and set it to spin down under power management.
Can anyone
suggest a suitable Linux solution for this parrot? I was
thinking about ecasound combined with a pitch shift plugin, if one
exists. If the solution could run entirely in RAM (CD booting,
perhaps?) then that would solve the problem of hard disk reliability.
Any of the shelf distro would probably suffice. For reliability I would
propose using a Flash disk. fast, small, clean, reliable, inexpensive.
There are heaps of small, cheap motherboards these days that have built in
sound so that won't be a problem. It would probably be easiest to do a small c program
which utilized some
ladspa plugins for the pitchshift, probably noise gate and, possibly the
delay.
Yup, you could knock up something with ecasound and some sort of scripting
language (I think there are perl and python bindings).
Alternativly pd would be a good coice, or writing a jack client in C would
be pretty easy if you can find a volunteer.
- Steve
6:53 p.m.
Monday 18 August 2003 22:29 skrev Steve Harris:
Cool project :)
On Mon, Aug 18, 2003 at 08:29:44PM +0200, Robert Jonsson wrote:
Flash disks wear out much quicker than HD's do.
They may, if you write to them, otherwise I don't think this is true. In this
case there is no reason to write to it.
/Robert
Can
anyone suggest a suitable Linux solution for this parrot? I was
thinking about ecasound combined with a pitch shift plugin, if one
exists. If the solution could run entirely in RAM (CD booting,
perhaps?) then that would solve the problem of hard disk reliability.
Any of the shelf distro would probably suffice. For reliability I would
propose using a Flash disk. fast, small, clean, reliable, inexpensive.
There are heaps of small, cheap motherboards these days that have built
in sound so that won't be a problem. I would go with a normal
IDE HD and set it to spin down under power management.
It would probably be easiest to do a small c
program which utilized some
ladspa plugins for the pitchshift, probably noise gate and, possibly the
delay.
Yup, you could knock up something with ecasound and some sort of scripting
language (I think there are perl and python bindings).
Alternativly pd would be a good coice, or writing a jack client in C would
be pretty easy if you can find a volunteer.
- Steve
7772
days inactive
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days old
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4 comments
4 participants
participants (4)
-
Daniel James -
Lee Azzarello -
Robert Jonsson -
Steve Harris