[gr8soundz]

What's wrong with the 2.0?
Does the 1.09 play wav and flac with 24/96 and above well?

V2.0 still has issues at 48/96/192. But it's more responsive and more compatible with all other files. Artist skip (imo) is the best reason to install V2.

 

[MLTKSHHBT]

V2.0 still has issues at 48/96/192. But it's more responsive and more compatible with all other files. Artist skip (imo) is the best reason to install V2.

Hope @tjstyle will fix those issues with the new firmware.

 

[gr8soundz]

I'm not sure it can be fixed. Don't think the P1 has dual oscillators and the TDA1387T is an old-school 16/44 chip. Someone please correct if I'm wrong, but I'm thinking anything based around 48kHz gets downclocked. Combine that with Hi-Res files and it may be too much for the low power CPU to handle.

https://www.head-fi.org/threads/revamp-acoustics.835215/page-35#post-13693144

 

[MLTKSHHBT]

I'm not sure it can be fixed. Don't think the P1 has dual oscillators and the TDA1387T is an old-school 16/44 chip. Someone please correct if I'm wrong, but I'm thinking anything based around 48kHz gets downclocked. Combine that with Hi-Res files and it may be too much for the low power CPU to handle.

So far it plays the 24/88.1 wav without problem, but not 24/96, but my p1 is having the firmware that comes with it.

 

[gr8soundz]

Even at 16-bits my P1 still has trouble with some 48/96/192 files.

 

[MLTKSHHBT]

Even at 16-bits my P1 still has trouble with some 48/96/192 files.

Oh serious?
All the wav files at 24/88.1 converted from DSD with foobar play smoothly without issue, but not 96 and above, it starts stuttering or just white noise.

 

[gr8soundz]

Both can be problematic: Anything above 24/88 or anything at 48/96/192 (no matter the format or bit-rate).

Might be best to pre-convert everything to 44 or 88.

 

[Dark Helmet]

I was able to play 24/88 with mine when I had it. Unfortunately mine wouldn't charge at all. Currently in transit to @tjstyle hopefully he gets it in the next day or so. Can't wait to get it back and start listening.

 

[tjstyle]

I'm not sure it can be fixed. Don't think the P1 has dual oscillators and the TDA1387T is an old-school 16/44 chip. Someone please correct if I'm wrong, but I'm thinking anything based around 48kHz gets downclocked. Combine that with Hi-Res files and it may be too much for the low power CPU to handle.

TDA1387T on the spec actually can run max at 384khz.
so it's native to work with 192khz/16bit
and it's run in non oversampling mode.

for the problem can you upload the file that have trouble to play?

 

[tjstyle]

And for problem reporting, specially on Hi-res audio, please provide info for Micro SD specification. since that have a big difference for read speed.

 

[gr8soundz]

TDA1387T on the spec actually can run max at 384khz.
so it's native to work with 192khz/16bit
and it's run in non oversampling mode.

Thanks for the clarification TJ. I've edited my previous post regarding this.

When playing most 48 or 96kHz files (multiple artists/albums from multiple sources) I get intermittent cracks or pops (clipping?) during the more impactful moments of each song. I've tried them at 16 and 24-bits in both FLAC and WAV formats with no tags but it makes little difference.

This does not happen with those same files on my other 4 daps. Now, for the P1, I'm resampling (in Foobar) 48 and 96 stuff to 44 and 88.

So 24-bit/88kHz plays fine but most files at 16/96 and 24/48 still have the problem. However, I believe I've gotten 1 Hi-Res album to play ok at 16/48 WAV while another at 16/96 WAV won't play at all (P1 just skips the entire folder; these are the only 2 exceptions I've found and 1 is from a SACD rip).

I use these cards on my P1 and hear the same issue with both:
Sandisk Ultra 64GB Class 10 Micro SDXC
Samsung EVO Select 32GB Micro SDHC

 

[tjstyle]

New firmware available here:
https://revampacoustics.com/downloads/

@gr8soundz for crack/clipping sound is WAV or FLAC files, I still have problem that problem only in FLAC with some unknown compression level or encoder and will try to solve that problem.
your MicroSD is fine for hi-res play.

I'm still on another town for my "normal" works, so I will continue to solving problem in audio works about next week.

 

[gr8soundz]

I figured encoding might be the problem for the SACD rip but great to see more new firmware.

 

[nmatheis]

Also glad to see me firmware keep coming. Thanks for your efforts maintaining this incredible sounding DAP @tjstyle.


And I'd just like to reiterate that this is the DAP I grab when I want high-quality sound without any fuss. So glad I discovered Revamp Acoustics and am eagerly awaiting your "real work" to be done so you can get back to work on PA10.

 

[MLTKSHHBT]

@tjstyle
Is there anyway to eliminate the annoying click/pop sound in the beginning playback of each track(regardless of file format, the sound can be mild to slightly loud, same files in the same sd card does not have this issue on zishan v2). I'm on the latest firmware.
I read somewhere it said "
If audio software or hardware player re-initialize DAC for each track, DC bias may be listened as click. To avoid such pops Smooth DC processing is recommended.

DAC condition changing may cause clicks."
In the case of p1, what do think the cause of the issue?