electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
 Forum index » electro-music.com » Help
MIDI over qmidinet
Post new topic   Reply to topic
Page 1 of 1 [4 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
wyleu



Joined: Jun 26, 2004
Posts: 41
Location: Sandbach,Cheshire, UK
G2 patch files: 4

PostPosted: Sat Mar 23, 2013 5:36 am    Post subject: MIDI over qmidinet
Subject description: MIDI errors over wireless network
Reply with quote  Mark this post and the followings unread

I've been experimenting with MIDI over IP.

A laptop tosh running 32bit Ubuntu 12.04.2 LTS precise connected to an Ensoniq EPS via a maplin usb to MIDI converter is communicating over wired 100Base to an EeePC running Ubuntu 12.10 quantal. connected to a JP1010 then Thru to a Nord Modular.
Ran a simple 1 bar sequence from the EPS addressing two channels. Channel 1 JV1010 Piano, Channel 8 Flute voice on Nord. LEft it playing for a couple of hours. No held flute notes and keyboard on EPS plays the JV-1010 with no error ( except that added by keyboard operator Smile )

Sadly wireless not as successful. Stopped notes and hiccups. Sad

_________________
Taz says:- 'My Sub My Rules'
Back to top
View user's profile Send private message
EdisonRex
Site Admin


Joined: Mar 07, 2007
Posts: 4579
Location: London, UK
Audio files: 172

PostPosted: Sun Mar 24, 2013 4:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wireless is a much less forgiving environment.

Try changing the wireless channel. Reduce interference. Make sure you have a clear 4-bar connection. Reduce interference. Try an ad hoc network just between the few devices without a hub. Shut off your microwave and DECT phones. Shut off your neighbour's ones too.

Wireless can be a bitch, it doesn't do realtime very nicely.

_________________
Garret: It's so retro.
EGM: What does retro mean to you?
Parker: Like, old and outdated.


Home,My Studio,and another view
Back to top
View user's profile Send private message Visit poster's website
wyleu



Joined: Jun 26, 2004
Posts: 41
Location: Sandbach,Cheshire, UK
G2 patch files: 4

PostPosted: Mon Mar 25, 2013 12:36 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for that.

I've been trying different wireless adapters, and removing sources of interference. When looking at the 100 Base T hub the rapidity of the flashing lights gives a rough idea of how hard it's being worked. Since I was investigating this for stage use I fear the only really acceptable way is a dedicated wired hub,which is a pity as it means more clutter.
The biggest problem is held notes. Given the people playing the instruments are very good musicians but not particularly technically savvy you can't really ask them to not worry and talk about panic buttons.

A plus is the absence of all the MIDI ports and simply allowing all devices to act on their own MIDI channel and just pick them up as they are needed. Anything can play anything rather than lots of plugging or configuring.

I'm looking at sticking it on Raspberry Pi's in the end but I've got to justify the reliability to myself first.

The wireless system hasn't managed to play for more than a minute without stuck notes and drops out for two or three seconds, obviously this will always occur at critical moments. The wired solution got throu' a two and a half hour rehearsal last night with no confused innocents.

_________________
Taz says:- 'My Sub My Rules'
Back to top
View user's profile Send private message
EdisonRex
Site Admin


Joined: Mar 07, 2007
Posts: 4579
Location: London, UK
Audio files: 172

PostPosted: Mon Mar 25, 2013 1:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

Most likely the tiny packets are making collisions, or worse, killing the bandwidth of the wireless channel. the 5GHz band is more tolerant, (-N) less interference and 56mb bandwidth. Stuck notes, unfinished bends/continuous controllers, yeah, it's ugly and bad, bad, bad for untechnical performers.

Good luck.

p.s. wires can be managed, even on stage. length shouldn't matter, and you can get dark colours. Use a good hub, not a cheap one - netgear blue metal boxes, not the plastic grey ones, work ok, no cheap chinese hubs.

_________________
Garret: It's so retro.
EGM: What does retro mean to you?
Parker: Like, old and outdated.


Home,My Studio,and another view
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic
Page 1 of 1 [4 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » electro-music.com » Help
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use