[PD] Read from and write to an array at once (?!?)
Dear list, I feel very happy and pretty stupid at the same time. I've been trying to make a simple sound-on-sound looper for a while now. I've search on the web but i haven't any really convincing. Most what i've found was complaints about the fact that it was difficult to achieve with tables, and that delay lines couldn't be flushed. Well, I just discovered that it was actually possible to read from and write to the same array at the same time. I thought it was impossible (i'd never even tried, to be honest). So here's my (probably stupid) question : is this a feature ? If it is that could probably explain why I didn't find much about loopers in Pd, since it is very straightforward. Cheers, Pierre ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Read from and write to an array at once (?!?)
On 03/08/13 17:11, Pierre Massat wrote: Well, I just discovered that it was actually possible to read from and write to the same array at the same time. I thought it was impossible (i'd never even tried, to be honest). So here's my (probably stupid) question : is this a feature ? Yes, it works fine due to the topological sort of the DSP graph into a DSP chain - but DSP is block-based, so be aware that each block is read as a whole before it is written - this probably only matters if you wanted to write to a different location for non-block-sized feedback effects. Also you might have little glitchy issues when table length isn't an exact multiple of the block size. There are some examples of [tabreceive~]--stuff--[tabsend~] in the docs, probably in the FFT section of the manual. A simple looper might be a [tabplay~]--stuff--[tabwrite~] thing with the tabplay~ and tabwrite~ both triggered from the same source, and retriggerd by the tabplay~ done bang... If it is that could probably explain why I didn't find much about loopers in Pd, since it is very straightforward. Claude -- http://mathr.co.uk ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Read from and write to an array at once (?!?)
Hi Claude, This is exactly what i did, having made sure beforehand that my table size is a multiple of 64. I didn't now it was that easy ! cheers, Pierre. 2013/8/3 Claude Heiland-Allen cla...@mathr.co.uk On 03/08/13 17:11, Pierre Massat wrote: Well, I just discovered that it was actually possible to read from and write to the same array at the same time. I thought it was impossible (i'd never even tried, to be honest). So here's my (probably stupid) question : is this a feature ? Yes, it works fine due to the topological sort of the DSP graph into a DSP chain - but DSP is block-based, so be aware that each block is read as a whole before it is written - this probably only matters if you wanted to write to a different location for non-block-sized feedback effects. Also you might have little glitchy issues when table length isn't an exact multiple of the block size. There are some examples of [tabreceive~]--stuff--[tabsend~] in the docs, probably in the FFT section of the manual. A simple looper might be a [tabplay~]--stuff--[tabwrite~] thing with the tabplay~ and tabwrite~ both triggered from the same source, and retriggerd by the tabplay~ done bang... If it is that could probably explain why I didn't find much about loopers in Pd, since it is very straightforward. Claude -- http://mathr.co.uk ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] Two new PD compositions
I've got two recent hour-length PD compositions available. More should be coming fairly soon. http://acreil.bandcamp.com/album/flutter-straight-on-the-nine-miles This one is based on the harmonic series of 30 Hz. Shorter excerpt: https://www.youtube.com/watch?v=6XAg1cc7tHY http://acreil.bandcamp.com/album/hg-iterated-glass-entering-3e2 This uses granular synthesis and feedback delay network resonators. Shorter excerpt: https://www.youtube.com/watch?v=szSV2jMMevU ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
