Hello,

Really new on pd.
Firstly I want to do the audio settings with my soundcard MOTU 828 mk3 and test them with the patch testtone.pd (launched by Media/Test Audio and MIDI).

In Media menu, I have the choice between "standard (MMIO)" and "ASIO (via portaudio)".
1/ Choosing "standard (MMIO)", I could theoretically set up to 4 output devices ("MOTU Analog 1-2" --> "MOTU Analog 7-8"), 2 channels for each one. But when I do this I have no sound, and have the message : "separate audio device choice not supported\; using sequential devices."
In fact it seems I'm allowed to set only one output device. When I do that, it works, I have sound for channels 1 and 2 (1 and 2 in pd, but it can be physically 5-6 for example, depending what I choose in the settings).

But I have only 2 channels...

2/ Choosing "ASIO (via portaudio)", exactly the same situation, except that the output names are now "(0) MOTU Analog 1-2", "(0) MOTU Analog 3-4"...
Note that I also have a new output, "(1) MOTU Audio ASIO" which doesn't work (I tried to set 2 channels or 8, same result)

Could someone light me on the multichannel configuration in pd ?
Maybe I have to configure something in the MOTU (via CueMix FX), but I don't know how...

Thank you in advance for your help or advices.

Matthieu

Hi Matthieu,

I see your post is a little bit old but I'm experiencing the exact same problem now with my setup.
I'm using a Windows 7 machine with a MOTU 828x sound card connected via USB to the PC and Pd 0.48.1 vanilla.

Here what I've done:

1. I've checked the "Use Stereo Pairs for Windows Audio" inside the "MOTU Audio Console";

2. opened PD and selected "standard MMIO" as driver from the "Media" menù;
3. now here's the list of outputs as it appears from the drop-down menu of "Media/Audio Setting.../Output device":

• MOTU Analog 3-4
• Loudspeakers (devide High ...
• MOTU Main-Out 1-2
• MOTU ADAT optical A 3-4
• Digital Output MOTU Audio
• MOTU ADAT optical A 1-2
• MOTU Analog 1-2
• MOTU ADAT optical A 7-8
• MOTU ADAT optical B 3-4
• MOTU Analog 7-8
• MOTU Analog 5-6
• Digital Output
• MOTU SPDIF 1-2
• MOTU ADAT optical B 1-2
• MOTU ADAT optical A 5-6
• MOTU Phones 1-2

As you see this list is pretty messed up and the names of logical consecutive output channels are not consequential. I would like to have 8 analog outputs from my MOTU so I selected the first item on the list (MOTU analog 3-4) then specified a total of 22 channels.

I'm obliged to set 22 as the total number of output channels because in my list MOTU Analog 5-6 are the last analog elements present. Because items in the list represent pairs of channels, this item corresponds to logical channel 21 and 22.

4. Then I created the dac object this way:

[dac~ 13 14 1 2 21 22 19 20]

Here's an image

This way I'm able to hear sound on all analog outputs of the MOTU even if I'm experiencing variuous 'clicks' and a series of "resyncing audio" messages inside the PD console...

I confess, this method is the only way I'm able to make this setup work but it seems to me to be pretty messy and not intuitive at all.

What seems to be even worse is that analog audio outputs inside the device list seems to change their order at each computer restart, so every time I have to restart from scratch.

• Is there some easier solution to this problem?
• Maybe a preference file I can create for PD to load at each startup containing all these settings?
• or there may be a way to programmatically select correct "analog outputs" from the device list in my patch (even if string parsing doesn't seem to be so easy in PD to me).
• Would launching PD from console, maybe from an ad-hoc script, solve the problem?

Thank you so much for your support
M

@matthieu1978 Hello......... too late!
@moscardo...........
I use the same device. You will need ASIO. I do not remember why, but I ended up using Asio4All as the driver. I think I had some problems with the Motu drivers but.........?

Asio4All lets you make the Windows equivalent of an "Aggregate Device"...... so as many sound cards as you can connect....... !...

Asio4All ..... http://tippach.business.t-online.de/asio4all/

Before you start open the Motu Audio settings and set the samplerate, 64 samples per buffer, Internal master clock, tick "Use stereo pairs for windows audio".
In the second window make sure everything is ticked that you might want to use.

Select ASIO in Pd.
Select Asio4All in the Audio settings window.
Tick to use the ins and the outs......

When you have selected Asio4All in Pd then set......
the samplerate you want (must match the setting in the MOTU Audio Console settings
Delay (msec) 2 or 3 should work.
Blocksize 64
Tick the "callback" box
Set 32 in channels (set more if you want to use the built in computer soundcard at the same time)
Set 30 out channels (if more channels... as above)

You can now look at the Asio4All setup. A little green arrow icon should have appeared in the bottom right of windows.
Open it, click the "Spanner" and set like this for all the analog channels.
Highlight (click) the boxes at the left side for digital ins and outs and the inserts and reverb returns if you want to use them them.

Even if the inputs (or outputs) are not in the correct order, they will stay the same, even after re-plugging the soundcard, rebooting the computer, and re-starting Pd.