Funny you should say that, the DSP correction was the last thing I did in the room. Its a tricky room, with one speaker essentially in a bay window, see picture below, this gives uneven bass output. The speaker to the right backs up against window and plaster board, with the speaker on the left in relative open space. I ended buying speakers with closed backs with no rear ports, this helps alot.
Ok then the graphs he’s sent you are definitely the ‘predicted’ results.
I would imagine you would just re-run the exactly same REW measurements that you did initially, to compare before and after?
But asking him is a good idea. I’m sure he would encourage verification. It’s always a good idea.
As mentioned, even Dirac doesn’t have a verification feature built-in. A similar discussion at the link below. I think the OP was happy in the end but it is best to verify, not just trust pretty looking ‘predicted’ curves:
I am not sure my other half would go for it, well, actually I am sure she wouldn’t! I did lobby hard to have the TV on the wall to the left of the left speaker (out of the picture). But I lost that battle. I wouldn’t have many of these problems if I had won! I keep telling her I am selfless…
To perform measurements with correction filters in place, you need to use the indirect method that is described below, together with the attached sweep files.
REW Measurement procedure using an external player for the sweep files
- download the sweep signals and add them in a play list (attached wav files for left & right channels) - start REW and configure your microphone - select “Measure” option and configure the panel with following options
** start Freq : 20 Hz*
** end freq : 20 000 Hz*
** length : 256k*
** “use acoustic timing reference”*
** “wait for timing reference”*
** the other parameters can be left as default*
- press “Start measuring” : REW will wait for a sync signal that is embedded in the attached sweep signal. As REW will play as well its own test signal when you press “Start measuring” , you must find a way to make sure this test signal will not be audible : the easiest way is to choose the internal card of your computer as output device (Preferences menu) and put your computer volume at zero
- play the left channel sweep signal (_L_refL) from your player and check that the level measured by REW is in the acceptable range (make sure the player stop after the file reading to not disturb the measurement)
- rename the measurement (L1 for instance)
- repeat the procedure for the right channel ( _R_refR) by playing the right sweep signal
Likely it does, since Spring 2 does (Spring 1 doesn’t).
DACs claim to support also 48k-base DSD if they support 48k-base PCM. Most ASIO drivers on Windows filter these out. When unchecked, HQPlayer also filters out 48k-base DSD rates even if DAC claims to support it (most actually don’t). Checking the box actually let’s these 48k-base claimed rates to become visible and available.
Using HQP with SDM as Default Output and bitrate limit of 44.1/128 I get silence from the DAC unless I have Adaptive Output Enabled, when it switches to PCM. In Roon signal path shows the correct DSD info to accopany the silence