Re: Start of Distributed MIDI Standard [...]
Re: Start of Distributed MIDI Standard [...]
- Subject: Re: Start of Distributed MIDI Standard [...]
- From: John Lazzaro <email@hidden>
- Date: Mon, 17 Feb 2003 14:41:04 -0800
>
Matthew Xavier Mora <email@hidden> writes:
>
>
How is this different than "MIDI over alternate transports" document
>
from the MMA?
The IEEE effort is doing a layer-2 Ethernet transport protocol for MIDI.
It is based on Phil Kerr's DMIDI (www.dmidi.org), and Phil is a key
person behind the IEEE effort.
Concurrently, there is an IETF effort in the AVT Working Group (home
of RTP, the VoIP and content-streaming standard) to define an RTP
payload for MIDI, and SDP arameters for configuring MIDI sessions
set up by SIP, RTSP, etc.
http://www.cs.berkeley.edu/~lazzaro/sa/pubs/txt/current-mwpp.txt
http://www.cs.berkeley.edu/~lazzaro/sa/pubs/txt/current-guide.txt
The MMA document is best seen as advice written to folks doing new
transport design for MIDI, so that they are aware of issues in doing
new transports for MIDI early in the design process.
The IEEE and IETF efforts overlap somewhat, but come from different
directions -- the RTP work started out as a WAN network music performance
project here at Berkeley:
http://www.cs.berkeley.edu/~lazzaro/sa/pubs/pdf/nossdav01.pdf
and then in the standardization process became more general, to
support both content-streaming, and potentially LAN applications.
However, as an RTP payload, it is designed to work within the IETF
framework of tools -- SDP for session description, SIP and RTSP for
session management, and for stand-alone embedded devices in a LAN
context, a way to find your IP number and DNS name, like DHCP or
Rendevous. Because the IEEE effort is layer-2, all of that session
management stuff happens in a much different way, that lives in
a world of MAC addresses and not IP numbers.
I'm sure Phil and Jim Wright are both listening in and will comment
soon, if they haven't already ...
-------------------------------------------------------------------------
John Lazzaro -- Research Specialist -- CS Division -- EECS -- UC Berkeley
lazzaro [at] cs [dot] berkeley [dot] edu www.cs.berkeley.edu/~lazzaro
-------------------------------------------------------------------------
_______________________________________________
coreaudio-api mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/coreaudio-api
Do not post admin requests to the list. They will be ignored.