Audio Precision released a new version of its software - The APx 500 Flex 10.0
It now allows to select a different audio interface for output and input when used with an audio interface.
Even better: I am now able to select a different sampling frequency for input and ouput.
This was much missing for me:
As I don't own an AP analyzer, I couldn't perform directly analysis where sampling frequency was different.
Amir measurements such as THD vs frequency over 90kHz bandwidth is typically using 48kHz on the output (the DAC) and 192kHz on the input (the Analyzer)
Same for the DAC filter evaluation: The DAC (DUT) is using 44.1kHz while you need of course a higher sampling frequency to analyze above the 44.1kHz/2 limit.
Amir owns an AP analyzer, so the inputs are the analyzer's analog inputs. This allowed him to select different sampling frequencies.
But I don't own an AP, I'm using a RME ADI-2/4 Pro SE as "analyzer", and, so far, it was not possible to select different sampling frequencies.
Worse even: I couldn't even select a different ASIO driver for input and output.
As far as the device has digital input and/or ouput, I can still use the RME as sole interface and link the DUT through digital I/O (with the limitation, again, that sf is the same).
Otherwise, I need to use ASIO4ALL, which always gives me random results - for some reason I don't understand.
Now, APx 500 Flex allows to select a different driver for inputs than for ouputs.
That means that I'm now able to perform the 2 measurements listed above directly in APx software.
They've done it by enabling Windows Audio driver.
That means that you can't select 2 different ASIO drivers.
But that's still good enough.
(ASIO4ALL is just using those and present them as ASIO anyway).
I think that Amir will also be happy about the addition of the Windows Audio :
He had to use ASIO4ALL before for devices that do not propose an ASIO driver.
Now he can directly select the Windows Audio.
It now allows to select a different audio interface for output and input when used with an audio interface.
Even better: I am now able to select a different sampling frequency for input and ouput.
This was much missing for me:
As I don't own an AP analyzer, I couldn't perform directly analysis where sampling frequency was different.
Amir measurements such as THD vs frequency over 90kHz bandwidth is typically using 48kHz on the output (the DAC) and 192kHz on the input (the Analyzer)
Same for the DAC filter evaluation: The DAC (DUT) is using 44.1kHz while you need of course a higher sampling frequency to analyze above the 44.1kHz/2 limit.
Amir owns an AP analyzer, so the inputs are the analyzer's analog inputs. This allowed him to select different sampling frequencies.
But I don't own an AP, I'm using a RME ADI-2/4 Pro SE as "analyzer", and, so far, it was not possible to select different sampling frequencies.
Worse even: I couldn't even select a different ASIO driver for input and output.
As far as the device has digital input and/or ouput, I can still use the RME as sole interface and link the DUT through digital I/O (with the limitation, again, that sf is the same).
Otherwise, I need to use ASIO4ALL, which always gives me random results - for some reason I don't understand.
Now, APx 500 Flex allows to select a different driver for inputs than for ouputs.
That means that I'm now able to perform the 2 measurements listed above directly in APx software.
They've done it by enabling Windows Audio driver.
That means that you can't select 2 different ASIO drivers.
But that's still good enough.
(ASIO4ALL is just using those and present them as ASIO anyway).
I think that Amir will also be happy about the addition of the Windows Audio :
He had to use ASIO4ALL before for devices that do not propose an ASIO driver.
Now he can directly select the Windows Audio.
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