Beta Test: Multitone Loopback Analyzer software

[DWPress]

I am not sure the Okto will let you go back to the PC for recording that way. I don't have one, but thought that was an SPDIF input.

I do it everyday. Okto takes AES input but you can convert coax SPDIF to AES without signal loss for a short run. I guess I'm asking if it's an issue sending the signal via USB to the same interface.

USB>Okto
Okto balanced CH1&2 > ADC balanced LR input
ADC AES > Okto AES input
USB>computer

BTW, this is a 30+ year old MSB PAD-1 ADC I'm hoping to measure to see if it's even close to specs. Here's a link to the thread I started with specs for the MSB toy. USB didn't even exist when this thing was made.

 

[Grooved]

I do it everyday. Okto takes AES input but you can convert coax SPDIF to AES without signal loss for a short run. I guess I'm asking if it's an issue sending the signal via USB to the same interface.

USB>Okto
Okto balanced CH1&2 > ADC balanced LR input
ADC AES > Okto AES input
USB>computer

BTW, this is a 30+ year old MSB PAD-1 ADC I'm hoping to measure to see if it's even close to specs. Here's a link to the thread I started with specs for the MSB toy. USB didn't even exist when this thing was made.

Hi,

If you have the "Dac8 Stereo", I think that it doesn't work, but with the "Dac8 Pro", it should be OK if you use mode 2:

Computer -> DAC8 Pro USB Output -> DAC8 Pro Analog -> ADC Input -> ADC AES Output -> DAC8 Pro AES Input -> DAC8 Pro USB Input -> Computer

In Multitone Analyzer, you select the ASIO driver for both Output and Input, and L+R for both should match the Analog 1+2 outputs and the AES 1 input

 

[Blumlein 88]

Hi,

If you have the "Dac8 Stereo", I think that it doesn't work, but with the "Dac8 Pro", it should be OK if you use mode 2:
View attachment 374479

Computer -> DAC8 Pro USB Output -> DAC8 Pro Analog -> ADC Input -> ADC AES Output -> DAC8 Pro AES Input -> DAC8 Pro USB Input -> Computer

In Multitone Analyzer, you select the ASIO driver for both Output and Input, and L+R for both should match the Analog 1+2 outputs and the AES 1 input

That is interesting and it cost nothing at all to try. Was just looking at the manuals and it didn't appear to work withe the DAC 8 Pro, but was unclear on the Stereo 8. It didn't rule it out in the manual and the image you have indicates it will let you record the digital inputs. Neat and helpful for this purpose.

 

[DWPress]

Yes, I have the 8 Pro. I use it for USB input and output daily this way in USB/AES mode. My turntable preamp/any other analog source > ADC AES output > AES input Okto > USB to computer for EQ and XO > back to Okto USB with 8CH of processed audio > XLR to amps. The Okto DAC8 Pro is much more than a 8ch balanced DAC existing on the cusp of the home and pro audio worlds with 2way USB, 4x AES inputs and internal channel control + rudimentary DSP.

I'll try to get to this soon now that I know it's possible. I know the Okto has a ASIO driver, so I would select the Okto ASIO for input and output within Multitone if I'm understanding correctly. I'll make sure all the other Windows settings line up. As I said, my Windows skills are very rusty, really appreciate the help.

 

[Blumlein 88]

Yes, I have the 8 Pro. I use it for USB input and output daily this way in USB/AES mode. My turntable preamp/any other analog source > ADC AES output > AES input Okto > USB to computer for EQ and XO > back to Okto USB with 8CH of processed audio > XLR to amps. The Okto DAC8 Pro is much more than a 8ch balanced DAC existing on the cusp of the home and pro audio worlds with 2way USB, 4x AES inputs and internal channel control + rudimentary DSP.

I'll try to get to this soon now that I know it's possible. I know the Okto has a ASIO driver, so I would select the Okto ASIO for input and output within Multitone if I'm understanding correctly. I'll make sure all the other Windows settings line up. As I said, my Windows skills are very rusty, really appreciate the help.

With ASIO you don't really need any Windows audio skills. That is the whole point of ASIO. It will interface with the hardware and software without letting any Windows issues get in the way.

 

[DWPress]

Just in case anyone is interested in my results - I added the data to my thread here about the MSB ADCs from the late 90's.

 

[Norbi]

Hello, I'm new here in this forum, just registered, although I've been using MA for a while. Thanks to pkane for this great software!
There is item #5 on the MA website in the "A few things to know" section that concerns me:

"Both, DAC and ADC must use the same sampling rate. Make sure you configure this in Windows audio device settings. MA will detect the correct sampling rate for the device and use it for WASAPI devices. For ASIO devices, please set the desired sampling rate in settings, under the gear icon."

Is this still a valid requirement? I'm asking because there is the possibility / two inputs for ASIO in/out sampling rate settings under the gear icon now.
Many thanks in advance for helping me on this question - perhaps someone can also explain to me the background for this requirement and how it affects the measurement results, if I select two different sampling rates.....I would asume higher ADC sampling rates are better for e.g. THD measurements - correct?

 

[pkane]

Hello, I'm new here in this forum, just registered, although I've been using MA for a while. Thanks to pkane for this great software!
There is item #5 on the MA website in the "A few things to know" section that concerns me:

"Both, DAC and ADC must use the same sampling rate. Make sure you configure this in Windows audio device settings. MA will detect the correct sampling rate for the device and use it for WASAPI devices. For ASIO devices, please set the desired sampling rate in settings, under the gear icon."

Is this still a valid requirement? I'm asking because there is the possibility / two inputs for ASIO in/out sampling rate settings under the gear icon now.
Many thanks in advance for helping me on this question - perhaps someone can also explain to me the background for this requirement and how it affects the measurement results, if I select two different sampling rates.....I would asume higher ADC sampling rates are better for e.g. THD measurements - correct?

No, that was for older versions of Multione. The current version supports different sampling rates for input and output.

 

[morillon]

hi... i am far from my computer...
but a question..
is it possible to define the calculation mode of the thd according to the ieee or iec approach...?
;-)

 

[pkane]

hi... i am far from my computer...
but a question..
is it possible to define the calculation mode of the thd according to the ieee or iec approach...?
;-)

Sure, it's possible. When would you use one or the other, under what conditions?

 

[GXAlan]

While we are doing feature requests, can you add software DC filtering prior to calculations since the E1DA Cosmos is somewhat popular and if you filter below 2 Hz, it would make graphs look pretty and potentially improve uV noise calculations if the DC is high enough

Low priority since I am not running many measurements nowadays. (When you hit endgame, you stop buying gear and you stop needing to measure and test.)

 

[morillon]

Sure, it's possible. When would you use one or the other, under what conditions?

My Ultra tests

Particularly when playing this. And looks like lots of jitter too If that was cigarette, no thanks I don’t smoke

forum.wiimhome.com

etc

 

[pkane]

My Ultra tests

Particularly when playing this. And looks like lots of jitter too If that was cigarette, no thanks I don’t smoke

forum.wiimhome.com

Not sure what that link means Generally, the difference would be only significant in the presence of large distortions, when the overall signal level will be higher than the fundamental due to their contribution. Distortion level would have to be pretty high for this to matter, I think.

 

[pkane]

While we are doing feature requests, can you add software DC filtering prior to calculations since the E1DA Cosmos is somewhat popular and if you filter below 2 Hz, it would make graphs look pretty and potentially improve uV noise calculations if the DC is high enough

Low priority since I am not running many measurements nowadays. (When you hit endgame, you stop buying gear and you stop needing to measure and test.)

For most computations, DC is excluded in Multitone. If you want to exclude it explicitly, just can change the lower measurement frequency to, say, 3Hz - 5Hz.

 

[morillon]

Not sure what that link means Generally, the difference would be only significant in the presence of large distortions, when the overall signal level will be higher than the fundamental due to their contribution. Distortion level would have to be pretty high for this to matter, I think.

the orders of magnitude of noise under the fundamental that I am wondering about...I will see if the person who made these measurements if rew can do it with M-T... and therefore these two options...out of curiosity... ;-)

 

[Sokel]

That one is maybe a silly suggestion,but could it be the panels be detachable,like to place them in two different screens or one on top of other,etc?

 

[pkane]

That one is maybe a silly suggestion,but could it be the panels be detachable,like to place them in two different screens or one on top of other,etc?

Something like this?

 

[Sokel]

Something like this?

View attachment 385161

Hey,I thought I was fast!

Yes!

 

[pkane]

Hey,I thought I was fast!

Yes!

It’s mostly working. Just some minor issues that have been bugging me and I’ve not had enough time to fix them all. Hopefully soon!