On Fri, Jun 17, 2005 at 11:27:14AM -0600, Garett Shulman wrote: > Asbjorn, LDAS looks perfect. Can you give more detail about the status? > -Garett
Did you read the info I linked to? <URL: http://www.q2s.ntnu.no/~asbjs/ldas/ldas.html > It is, it must be said, still in early development. But some basic functionality is present, and it has (almost?) reached a stage where it will be useful for me. LDAS consists of a sender and a receiver. It is, currently, capable of quite reliable one-way transmission of two channels of audio. (More than two channels should also work, but has not been tested in this version.) (I also just did some testing that indiciated that full duplex may be achieved by running both sender and receiver on both computers. This may serve as a stopgap until I get around to merge the sender and the receiver into a full duplex version.) Audio is taken from the analog input of the sending computer, and delivered to the the analog output of the receiving computer. The sender is very simple, it is mainly a loop reading data from the sound card and writing them to a network socket. The receiver is a bit more elaborate. It has two threads, one receiving data from the network and queueing them, the other thread transferring data from the queue to the sound card. The purpose of the queue is to deal with lost/late/out of order/duplicate packets. There is also a very simple mechanism (skip/reuse samples) to deal with sampling frequency drift. (The sender and the receiver will not have exactly equal clock frequencies.) The latency is currently four sound card periods plus queue length, network transmission time and A/D and D/A conversion time and some processing time. With a good sound card and a short network distance, latencies suitable for music playing should be attainable. (I have measured this version to between 70 and 80 milliseconds, but that was with 10 ms periods and a queue of three periods.) It is still a bit early. But if you don't mind trying early code, I'll send you the sources so you can see if it fits your needs. Asbjørn
