Same as I’m usually using on this server:
1x=poly-sinc-gauss-long
Nx=poly-sinc-gauss-hires-lp
Modulator=ASDM7EC-light
At 44.1k x256 output rate.
1 Like
I have a problem understanding convolution curves with HQP.
I use Focus Fidelity software to calculate and generate the curves and I get the L and R curves as shown in the image.
When I put the Wav files generated by Focus Fidelity in HQP (Matrix Pipeline) and when I “plop” the curves, I get curves that are not similar…
Why these differences?
In this case, what to do and what to prioritize? :
- I keep the Focus Fidelity curves and I do not take into account the HQP plop curves
Or - I modify the Focus Fidelity curves manually in order to obtain the desired final curves in HQP Plop
HQPlayer plot shows response of the correction filter. To me it would seem the Focus Fidelity plot is estimated resulting average response in room, not the correction filter itself.
Please note that these have few dB positive gain, so you need to compensate for that using equivalent negative pipeline mix gain. Otherwise you will likely run into limiting.
1 Like
I don’t see where and how many to see these db on the Focus Fidelity curves, how many do you see?
I did the opposite, I put it on positive otherwise the sound is really weaker otherwise
In conclusion, I understand that we must keep the result produced by Focus Fidelity, is that right?
but it’s surprising to see such big differences.
In the HQPlayer plot, see how many dB it goes over 0 dB line.
And yes, the overall volume will sound lower, because for majority of frequencies it is below 0. But for those frequencies that are above 0 dB you would get heavy limiting if you don’t compensate for that maximum gain boost. It could take a while for music to happen to have close to 0 dBFS at those peak frequencies, but it will eventually happen.
So the only option to compensate for the seemingly lower level is to just crank up your amp’s volume.
Indeed, in HQP it is the response of the correction filter, and which corresponds to the IR gain of Focus Fidelity.
And there, we have the correspondence of these curves.
And I also understood about the db 
Thank you for the explanations, because I had a big moment of doubt.
1 Like
Really good and high-quality new album Trevor Horn - Echoes Modern and Ancient. 192k @ Qobuz. I just can’t get enough!
It doesn’t look like real HiRes to me. There is a hard section at approx. 22kHz, which corresponds to a CD (44.1kHz).
At about 28kHz there is a line, probably from the switching power supply of the ADC.
Dither and some peaks go up to about 48kHz, which would correspond to HiRes of 96kHz. But we’re talking 192kHz here, where the Nyquist frequency is 96kHz!
Other songs in the album are dithered up to 96kHz or not and with the same limited frequency spectrum.
3 Likes
Sorry for trusting fake HiRes! Glad you noticed.
2 Likes
More money for 192khz. I don’t think anyone could tell the difference between this 192khz file and a CD quality download or rip.
Exposed, again.
One of the examples where the metering feature is useful…
6 Likes
What is a better choice for DSD music reproduction on HQplayer:
a) Buy the album converted on DSD512
b) Buy the album on the original recording High-Resolution PCM 192 kHz and make HQplayer do the Upsample
c) Makes no difference
With HQPlayer you have multiple filter and modulator options to fit the music and your DAC. With the pre-converted album, you get what the label chose, which may not be the best fit for your setup.
4 Likes
Yes, I agree and you also ROI saving money! WAV 176.4kHz has the lowest price.
My current setup and DAC can do DSD512.
Another question, If buy a DSD512 version, will upsampling to DSD1024 be less processing intense for HQplayer filters than working with a WAV 176.4kHz file?
Certainly not if you want to do any EQ on it…
If you are using HQPlayer, just get the one closest to the original recording. You are then future proof for what ever DAC(s) you may be using in future too. HQPlayer will perform the conversion for you to what ever is optimal for the DAC in question.
2 Likes
From the description:
“Original Recording Format: PCM 176.4 kHz”
I would get that one.
1 Like
If you do get the 176.4khz file, could you post a pic of the metering output for one of the songs? Just curious. I’m listening to the 16/44 version of this album on Qobuz, sounds good.
1 Like
Will do if I get it! Still deciding 
Hi!
Showing playing DSD 256 from DAC-60, Desktop client
This is on mobile running using Hqplayer App on higher rates on Embedded Hqplayer
1 Like
I think I found myself a new favourite: Sinc-long / ASDM7EC-Super 512+fs.
Been listening to it since the 5.2.0 update. It has a precise and natural sound without sounding clinical or harsh in any way.
4 Likes
Great recommendation on guass-halfband for redbook, Mark. The music sounds much more immediate and defined on my Lampi DAC than the previous choice of guass-long. Thank you!
2 Likes