[sdiy] rtpMIDI questions

[Tony Mowbray]

Hi all, 

 

There is a tool available on the Play Store (assume one is also available for Apple devices), called WiFi Analyzer. It does 2.4 GHz, 5GHz and 6GHz bands – you can see others around you that might interfere with you. From there you can move the frequency of the 2.4G and 5G (presumably also 6G if you have it – I have none) within the modem so you get as free as is possible channel. I would imagine 2.4G would be sufficient for MIDI, though that really depends on what else is sharing the channel.

 

As always, network bandwidth is shared, the less “other” devices the more you “should” have available for MIDI. There are no guarantees however, as on networks, there is much retransmission, especially in multi device environments. Wired may also have the same issues though you won’t have other neighbours crashing your channel

 

 

 

 

Kind Regards

 

Tony Mowbray

 

From: Synth-diy <synth-diy-bounces at synth-diy.org> On Behalf Of John Speth via Synth-diy
Sent: Friday, April 19, 2024 6:23 AM
To: SYNTH DIY <synth-diy at synth-diy.org>
Subject: Re: [sdiy] rtpMIDI questions

 

It's a shared WiFi system at my home (one laptop, four phones, two Rokus). However, my WiFi system uses both 2.4 GHz and 5 GHz for over-the-air transmissions. About half my devices are using WiFi use 2.4G and half use 5G I'm not sure how that plays into my results. The nearest house is about 50 feet away from my house. Is it possible that WiFI radiation from a nearby house can interfere with my WiFI. That seems plausible to me.

 

Are you saying that WiFi loading could have been the reason for my observations? I suppose it's plausible. Could there be other causes?

 

I realized soon after I started testing that I may have higher expectations than is possible with WiFi. I don't know any way of debugging this. Based on my observations, I believe reliably delivered time accurate MIDI over WiFi is not possible because of occasional timing errors. Kinda shows the RTP part isn't really realtime enough for MIDI.

 

Thanks - JJS

 

On 4/18/2024 9:20 AM, Mike Bryant wrote:

Yes it works well over WiFi.  But are you using a private WiFi for it, or sharing with other stuff ?

  _____  

From: Synth-diy  <mailto:synth-diy-bounces at synth-diy.org> <synth-diy-bounces at synth-diy.org> on behalf of John Speth via Synth-diy  <mailto:synth-diy at synth-diy.org> <synth-diy at synth-diy.org>
Sent: 18 April 2024 15:34
To: SYNTH DIY  <mailto:synth-diy at synth-diy.org> <synth-diy at synth-diy.org>
Subject: [sdiy] rtpMIDI questions 

 

Slightly off topic post but I'll try anyway:

Can anybody answer some basic questions about rtpMIDI from Tobias Erichsen?

Is it supposed to work well over WiFi or is it meant just for wired 
networks? I've had some good and bad results when using it over WiFi. I 
haven't tried using ethernet cables yet. I assume results will be good. 
Errors I've seen using WiFi relate mostly to timing (plausibly expected 
but unwelcomed) and rare instances of silence or gaps (not expected). 
Usually timing sounds about right but not always.

Thanks - JJS


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