Use a virtual soundcard together with liveprofessor & use a vst convolver, you can route the input & output in asio4all. I do use a microphone if I want to measure speakers or headphones, but I also use a digital audio input on my MacBook to analyze the sweep before it’s fed into the DAC. This should give a very pristine view as to what HQP, filters, and convolver do to the original sweep frequencies and phase. REW can record and analyze the output of a sweep, so you can judge what effect the convolver and your impulse response is having. I use a digitally recorded REW sweep to play through my system. Is there a better way than to send it through the system and speakers and then measure with a microphone, because to me it seems as if the best way to do it is to take the measurement from the DAC output. My question was: how do you measure what comes out, and what criteria do you use to judge whether a convolution engine is doing its job or not. DSD and PCM, at different sample rates, with different filters. All i'll say is that i've tried them all. I do not want this thread to turn into a discussion about HQPlayer settings. So far I’ve not encountered any issues with the convolver, but configuration or settings in HQP may cause some ill effects, so maybe you can share the settings you use with it. I have a digital recording of an REW sweep I play over my system and use REW to record the output, both digital and analog. I can see exactly what changes that are introduced into the output by the convolver, from frequency response to phase. It’s easy enough to test that it’s doing what I expect it to do with REW. I use HQP convolver for EQ and phase correction, mostly with 2 channel. Does anybody know if this has been done before?
#Liveprofessor errors how to#
To be honest, I wouldn't even know how to design an experiment to test which convolution engine is "better", short of only using my ears. At the moment I have no way to run a signal through the convolution engine and take a measurement to confirm with hard evidence what I can hear. It appears that the smearing is a problem that only happens with HQPlayer on my system. For my purpose it will need to have an ASIO in/out interface and run on Windows. I know there are other convolution engines out there which I have not tried. JRiver also has a convolution engine - since I own a copy of JRiver, I decided to try that. I was quite surprised that the problem went away immediately, given that HQPlayer is so highly rated by CA members.
So I purchased a copy of Acourate Convolver.
Eventually it occurred to me to try swapping the convolution engine. Tried swapping amps, swapping DAC's, swapping computers, everything. I have been tearing whatever's left of my hair out trying to get to the bottom of the problem. In other words, the sound was unacceptable. Yet the listening experience is quite a let down - the upper midrange and lower treble are smeared, and the smearing is so bad that it sometimes hurts my ears. The measurement sweeps look pretty much flawless. I made the filters as perfect as my knowledge allows.
I generate the filters with Acourate, and until recently I have been using HQPlayer as my main convolution engine.įor a long time now, I have been mystified by a problem I have been having. I don't post much on CA these days, but those who remember me from before will know that I run a computer based crossover with 8 digital channels out.
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