Good question here- this work is about creating excessive chatter and doesnt rely on a fixed phase and sync'ed clocks so the inexpensive options you mentioned would be welcome. I should have mentioned this part in my first post.
thanks Greg On Sun, Oct 25, 2009 at 3:09 AM, Justin Glenn Smith <[email protected]> wrote: > How important is phase between the channels? If channels drifting out of > phase would > be a problem, mixing in soundcards that do not share the firewire clock is > out of > the question. If they do not need to be in phase (ie. the channels are used > for > isolation rather than mixed for virtual positioning), then there are a larger > number > of cheaper options to consider. If they need to be in fixed phase than as far > as I > know firewire cards with a shared clock is your cheapest option aside from > soldering > soundcards to one another so they share a single clock. Firewire clock > chaining is > not limited to OSX, it will work under Linux too, and I would be surprised if > it did > not work under Windows. > > jurgen wrote: >> You have to be realistic - 25 channels is an extremely hardware >> ineffective configuration because audio interfaces come by increments of >> 8. Meaning for 25 channels you need 4 of those. >> I believe you can do it cheapest if you use OS X: you may borrow from >> friends any brand of device and then create in OS X an 'aggregate' >> device. This combines any number of any audio interfaces into one big >> virtual interface that you then can address with jack. It also solves >> the problem of the 25th channel because the aggregate device may include >> the machines in-built audio hardware on top of fw/usb things. >> >> Good luck >> Jurgen >> >> On Oct 25, 2009, at 12:32 AM, Greg Pond wrote: >> >>> I am helping some friends make their first PD sound installation. They >>> want 25 channels simultaneously running prerecorded samples and have a >>> limited budget and as yet own no equipment. I use the presonus firepod >>> external card in my work which could work with a single cpu chaining >>> 3-4 of firepods together for their project but I doubt their budget >>> can support buying so many of them. For amps we could build 25 simple >>> chip amps with op amp ICs to keep costs down but those that I have >>> built in the past are useful for low volume only. If anyone has other >>> hardware configurations and amplifier schematics that they use I would >>> be grateful for suggestions. >>> >>> thanks >>> >>> Greg >>> >>> _______________________________________________ >>> [email protected] mailing list >>> UNSUBSCRIBE and account-management -> >>> http://lists.puredata.info/listinfo/pd-list >> >> >> _______________________________________________ >> [email protected] mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list >> > > _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
