Is the delay in the comb~ object is in samples, millisecond? I have been realy surprised to look at the resulting spectrum from a comb filtered noise ...

thanks!

Hello,

I am now trying to mix down a eight channel ambisonic mix in PD for a eight channel concert.

Since I don't have any audio software which allow me to open 8 channel wave files, I have decided to use 8 [writesf~ 1] ... and now it became strange. I often get some message like ...bad descriptor... It is mostly random, sometime for this file, sometime for this other file ... is that me or what?

Also, when I try to erase the eight file in my windows explorer, I often get message like : opened by an other software ... but PD [writesf~] have all received [stop{ messages. Again, this is randomly hapenning ... is that me?

My last option, surely the most simple, is to use a sole [writesf~ 8] object and try to find an audio editor (freeware!) which open multichannel wave ... anybody know such freeware?

Thanks1!!

Hello,

I am know building a small GUI for a patch that I have been working on for a while (please read: the patch is now unreadable and I need a clear control on this!).

I was wondering what are your favorite means for GUI ... I now hesitate between two big trends: 1) using graph on parents 2) a new window with numbers, toggle, etc. with lot of send-symbol.

The graph on parent make me feel strange (dealing with numbers and other interface object position) ...

What are you favorite ways of doing it?

Thanks!

Hello,

The problem briefly stated : how can all the number2 objects in a patch can send their value when opening the patch to the whole [+] and [expr] objects without going in a tedious [loadbang] network?

The problem in detail :

I have a nice patch which use lot of [random]. My random objects are used to create a given random sequence between let say M and N (N-M is feeding the right random inlet) and M is then added to random output. This is achieved using number2 objects, some [+] and possibly [expr]. Since I don't know in advance what should be M and N ... I go for few hours of fine tuning the whole patch ... always using number2 objects with the "init" thing turned on.

After saving the patch, going to bed, wake up, turn on the patch. I don't get the results from the fine tuning ... the problem seems to come from the fact that the [+] objects must receive the number out ... which are only sent when banging, or changing the number!!! But, since I have nearly 30 number2 objects to fine tune everything ... I wont go in manually banging every number!

That drive me crazy!!! All the number are nicely set ...

Should I simply create a sending bang (from a loadbang) to every number in the patch? Is their a more elegant way of doing this?

Many thanks!

Bye bye!!

Philippe-Aubert G.

I don't use soundfiler in my patch. It is builk like a Ambisonics render using readsf~ and writesf~. I don't hear anythin since their is no dac~.

After boging with this last night, I now use [writesf~ 8] and I use matlab to open the multichannel file + and a little Matlab program that I made to extract individual files ... but for 270Meg 8 channel file ... Matlab is also having memory trouble ...

So, finally, I am >>>really<<< looking for a freeware which can open multichannel wave files ... and save them as sperate wave file ....

Bye bye!

I am now dancing under the voice a the japenese (?) girls (in the first part?) ... while the singular value decomposition substructuring technique is passing under my hands ...

Oh god, I am at my office, and I look damn crazy dancing like this!

What is yoru hardware for such hardtime-robust-audio-live PD project?

Thanks for this good piece!!

Did someone have tried PD on mini board PC like VIA EPIA 800 All In One Motherboard (see [http://www.mini-itx.com/store/?c=2#p1622)?][0] ... it just found quite cheap to get a 800Mhz for 59pounds = 105USD ... I think that of those board have a 4 output soundcard and even SPDIF ...

I was (maybay) planning to get some of these board for sound installation ... so I was looking for advice ...

bye!!

[0]: http://www.mini-itx.com/store/?c=2#p1622)?

I found that second order Ambisonics (using a not opitmized home made patch) seem to run perfectly over my P43.0Ghz machine.

ambipan~ object are surely lighter. Also, just try it on your machine to know if it work well. http://cicm.mshparisnord.org/dl_en.htm.

Ambisonic should not be so hard to run, normally its only a matter of multiplication of an incomming signal by some positive or negative gain ... each loudspeaker haveing its own gain for a given target field.

Thanks, by the way, I have nearly finished a new manuscript for the Journal of the Acoustical Society of America (see the first paper in JASA vol 117 no 2) and it is quite nice (at least from our view point!) I hope to submit it this month, thus meaning a potential full length paper in 2006. For a nice converage of ambisonics, take a look at Poletti 2000 and Bettlehem 2005. Even it is not precisely related to ambisonic, many of the theoretical developments match ambisonic theory ... the fundamental of course! not the A-B-C-format whatever!!!

bye bye!

Zac,

Your comment remind me that my working structure is somewhat messy and improvised along the results obtained from the patch. This suggests me to reconstruct a patch once the results are satisfying.

This lead me to an other question: I don't know if my use of graph on parent is okay, but I found that dealing with object/graph position on the parent is something frustrating in comparison with send/receiev object.

Ok, what would be your "best of" list of simple PD GUI design?

Again fooled by the apparences, I will take care of this ...

Thks again, bye bye!