There's the rub... As I said there are very good reasons why even the most expensive DSD editing suites only convert the tiniest portions of a DSD content to multibit for processing and back...
It will certainly work in Felipe's setup since he got it working with PCM, so if he can live with the loss in SQ, he's fine. The reason you go with DSD, especially high-rate DSD is that you get better quality that way. The two legs of format conversion destroy that quality.
By the way, here's a very interesting video by David Griesinger I am watching. It could potentially be an additional EQ to be done on top of the headphone EQ curve:
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Worth checking out for Headphones EQ (200 models included): https://www.acustica-audio.com/pages/specials/sienna-free
No one does hardware processing emulation like Acustica Audio. I used to beta test their Nebula processor. I lost interest in every other VST effect I had at the time.
No one does hardware processing emulation like Acustica Audio. I used to beta test their Nebula processor. I lost interest in every other VST effect I had at the time.
Thanks for the link. What does Sienna do?
I tried the EQ shown in the video (with David Griesinger help). The results were pretty good, but never what I was really seeking. Certainly worth trying and it can teach you a few things. That's a tale for another thread. 🙂
I tried the EQ shown in the video (with David Griesinger help). The results were pretty good, but never what I was really seeking. Certainly worth trying and it can teach you a few things. That's a tale for another thread. 🙂
Sienna has EQ curves for rooms and 200 headphones.
I mostly know Griesinger's work on Digital Reverberation from when I coded some Reverb DSP algorithm last year or so. He investigated Concert Hall reverbs a lot and built something which he then presented to Lexicon. The latter then incorporated his technology in their effects processors.
Haven't yet tried that Griesinger HP EQ. Actually, I haven't spent much time with EQ APO + Peace either as I usually am on headphones only by necessity (wife working from home, some noise isolation sometimes) as I prefer listening with speakers in a room. Nonetheless, it's interesting.
I was only looking at the realtime DSP aspect because I wanted to investigate how much I can use it for a low cost DIY measurement rig. Got it working realtime with my laptop's internal Realtek, but couldn't get it to work at all with my Behringer UMC202HD audio interface... bummer. So, any DSP I can do with Audacity but offline.
I mostly know Griesinger's work on Digital Reverberation from when I coded some Reverb DSP algorithm last year or so. He investigated Concert Hall reverbs a lot and built something which he then presented to Lexicon. The latter then incorporated his technology in their effects processors.
Haven't yet tried that Griesinger HP EQ. Actually, I haven't spent much time with EQ APO + Peace either as I usually am on headphones only by necessity (wife working from home, some noise isolation sometimes) as I prefer listening with speakers in a room. Nonetheless, it's interesting.
I was only looking at the realtime DSP aspect because I wanted to investigate how much I can use it for a low cost DIY measurement rig. Got it working realtime with my laptop's internal Realtek, but couldn't get it to work at all with my Behringer UMC202HD audio interface... bummer. So, any DSP I can do with Audacity but offline.
Two other corrections (EQ) I learned about are: 1. correction for our own hearing deficiencies (Peace has a hearing test mode), and 2. correction when using IEMs for the resonance inside the ear canal caused by using the IEM (something like a notch at a specific frequency - that's from Lipshitz apparently).
I investigate the possibility to export Peace APO files to Audacity but Audacity doesn't accept the XML format, I tried changing to Audacity formats but doesn't works.
I have no additional information on this, I'll let you do a search for that.
No, you set your EQ in Carla.
Another way of saving EQed audio files is setting a D.A.W., e.g. Reaper or Ardour, using whatever EQ plugin you prefer. This can be used freely, and internally, the processing can be set to quite high quality, e.g. 64-bit, 192kHz or probably even more than that.
I'm still not clear on why the conversion would be done offline. Since DSD files can't be EQed, they have to be converted to PCM for any EQ to be done. Then the saved PCM would be converted (real time) back to DSD to feed the DAC. Any files originally in PCM are already being converted the DSD for playback.
If the DSD files are EQed in Audacity, then saved, you can't change that EQ without doing it all over again. For me that would be a disadvantage, because I tweak the EQ a lot before arriving at something long term. I simply can't see any advantage to doing the EQ in Audacity. What am I missing?
If the DSD files are EQed in Audacity, then saved, you can't change that EQ without doing it all over again. For me that would be a disadvantage, because I tweak the EQ a lot before arriving at something long term. I simply can't see any advantage to doing the EQ in Audacity. What am I missing?
It's just a matter of practicality which he thought about initially I think: if he has EQed the PCM files, then he can just lump all processed PCM and DSD files in Daphile and press play.
That way, his PCM is already Headphone-EQed and he hears the music in his setup's sweet spot, which is DSD sent to his DSD noDAC.
However, the problem of EQing DSD remains.
Doing it by DSD -> PCM + EQ -> DSD again should be avoided because of losses. It can still be done but it's not ideal in his setup (nor was it in mine and I had a native DSD DAC, the iFi iDSD Nano, which after free firmware updates was capable of DSD256 even though that was never printed on the box!).
Hence my recommendation that he treats the DSD EQ in the analogue domain. Note here that for practical listening, there should be a true bypass with the analogue EQ so that pre-processed PCM can go through without a second touch of EQ.
Doing it realtime for PCM is worthwhile because then you don't need to do time-consuming PCM Processing (and often you'll keep at least two versions, taking space).
Best of both worlds, hitting the DAC sweet spot, keeping the DSD source files as clean as possible.
By the way, come to think about it: if the analogue-domain EQ is good enough to correct for his headphones, then you can avoid offline processing AND realtime processing as well: just do it all in the analogue domain: Daphile does PCM->DSD, then analogue EQ it. DSD goes straight through, then EQ it.
Or compare with realtime EQ for PCM then sent to the DAC + Analogue EQ Bypass, and for DSD, compare the lossy two-leg process of DSD->PCM EQed -> DSD with DSD straight through + Analogue EQ.
I use Audirvana on Mac myself and I can do EQ there for PCM before it is upconverted to DSD. Never used it though as l listen mostly on speakers, but it's worth a try.
That way, his PCM is already Headphone-EQed and he hears the music in his setup's sweet spot, which is DSD sent to his DSD noDAC.
However, the problem of EQing DSD remains.
Doing it by DSD -> PCM + EQ -> DSD again should be avoided because of losses. It can still be done but it's not ideal in his setup (nor was it in mine and I had a native DSD DAC, the iFi iDSD Nano, which after free firmware updates was capable of DSD256 even though that was never printed on the box!).
Hence my recommendation that he treats the DSD EQ in the analogue domain. Note here that for practical listening, there should be a true bypass with the analogue EQ so that pre-processed PCM can go through without a second touch of EQ.
Doing it realtime for PCM is worthwhile because then you don't need to do time-consuming PCM Processing (and often you'll keep at least two versions, taking space).
Best of both worlds, hitting the DAC sweet spot, keeping the DSD source files as clean as possible.
By the way, come to think about it: if the analogue-domain EQ is good enough to correct for his headphones, then you can avoid offline processing AND realtime processing as well: just do it all in the analogue domain: Daphile does PCM->DSD, then analogue EQ it. DSD goes straight through, then EQ it.
Or compare with realtime EQ for PCM then sent to the DAC + Analogue EQ Bypass, and for DSD, compare the lossy two-leg process of DSD->PCM EQed -> DSD with DSD straight through + Analogue EQ.
I use Audirvana on Mac myself and I can do EQ there for PCM before it is upconverted to DSD. Never used it though as l listen mostly on speakers, but it's worth a try.
I"d be surprised if it could. Unless it converts to PCM then back to DSD. It's worth looking into.
Guys I'm looking not only to EQ headphones also to do DRC always DSD files but I guess is the same once solved the problem to EQ DSD files & be saved.
I was thinking about Caria, but it's valid for any software - real time or offline saved. Does the software or player do the EQ to DSD without changing it to PCM? If it does not, then you might as well convert your DSD files to PCM.
Of course you are converting your PCM files to DSD for your No-Dac anyway.
Of course you are converting your PCM files to DSD for your No-Dac anyway.