Paaf system

Presenting yourself, your equipment and music in pictures and text

Moderator: Staff

User avatar
lejonklou
Administrator
Administrator
Posts: 4376
Joined: 2007-01-30 10:38
Location: Sweden
Contact:

Re: Paaf system

Post by lejonklou » 2018-12-07 21:42

Paaf wrote:
2018-12-07 14:43
Well isn't this hilarious.... I fine tuned the placement of little feet under a little board on which I place the PSU for the NAS. After many AB tests, I was content. Some hours later I was in "regular mode" not "extreme tune method nerd mode" - and compared this perfectly tuned thing with simply placing the PSU on the desk. It was the same! LOL!
That finding is a good sign you've not gone crazy, but still capable of judging the actual result of your experiments! :)

Paaf
Active member
Active member
Posts: 242
Joined: 2012-02-22 18:21
Location: Stockholm

Re: Paaf system

Post by Paaf » 2018-12-09 15:18

Thank you. :)

Room acoustics vs tune method.

Sound in my system is tilted to the left. The right speaker stands in a corner. For years I thought the tilt was because of me - my right ear is not as good as my left ear.

A friend, when asked to point to the center sound, pointed to a position about a third from the left speaker. This indicates that it's due to room acoustics.

Using some test tracks now, left sounds are fine, but center and right sounds have problems. The further to the right, the bigger the problem with the stereo imaging.

In fact, digging deeper, it seems that some right sounds are positioned in the center, others between the center and the right, and others just to the right as they should be.

I assume it is frequency dependent. This causes some instruments to have OK imaging, others end up in the wrong position, and wide range frequency instruments like a guitar or piano gets quite a diffused stereo image.

Today I placed objects around the right speaker, a rolled up camping mattress with "massage pattern", a foam roller also with "massage patterns" (absorbing and deflecting), some pieces of packing foam (absorbing) etc. After some rearranging, and realizing that part of the negative effect was due also to left speaker reflections, I had a noticeable improvement in the imaging. Still far from correct but at least better, no obvious tilt to the left etc.

ANYWAY.. after I was satisfied, I went into tune method mode instead, and tested the sound from the other room WITH and WITHOUT all the weird acoustic stuff and... annoyingly without had better tune. GAH!

Paaf
Active member
Active member
Posts: 242
Joined: 2012-02-22 18:21
Location: Stockholm

Re: Paaf system

Post by Paaf » 2018-12-14 14:20

A funny random thing.
I had the same song on my NAS as both 320k mp3 and lossless FLAC. In the past I've compared such many times by sound - typically ending up in "treble sounds a bit dirty" for the mp3.

I now compared with the tune method instead. Oh yeah.

sunbeamgls
Very active member
Very active member
Posts: 719
Joined: 2012-04-04 15:19
Location: North Wales
Contact:

Re: Paaf system

Post by sunbeamgls » 2018-12-14 22:51

Try putting your foam stuff along the side walls at the first reflection point and see how you get on. It might be the closer proximity of the rh side wall rather than the corner itsself.

Or it might not :)
AEDSM; AEBox/1; 3x Tundra Stereo 2.5; PMC 20.26. Blogger. Exakt Design. SO measuring.

Paaf
Active member
Active member
Posts: 242
Joined: 2012-02-22 18:21
Location: Stockholm

Re: Paaf system

Post by Paaf » 2018-12-16 23:34

It's a good idea Sunbeamgls, a friend also mentioned the same thing. There are some random objects, curtains and flower pots on the wall at the height of the speaker, so it's not a hard shiny wall... but there is a window behind all that so it's definitely worth a shot. Imagine the WAF of large grey audio damping wool plates all over the windows in the living room! :)

Meanwhile, I've upgraded all power cables as well as the speaker cables. More about that later.

Paaf
Active member
Active member
Posts: 242
Joined: 2012-02-22 18:21
Location: Stockholm

Re: Paaf system

Post by Paaf » 2018-12-20 16:26

I placed a pillow on the right wall in the right corner, just to the right of the speaker. That is, not at the previously mentioned point about midway between the speaker and the listening position, but actually just next to the corner.

The huge skewing of the stereo image is solved! I can't explain it. That position isn't usually a problem area. The pillow doesn't dampen much mid range or upper bass. When I measure the room acoustics, there doesn't seem to be a difference with and without the pillow. BUT... stereo image is now "acceptable".

Also, since I measured the room acoustics for the first time now, I realize it is obviously seriously flawed, massive dips and so on.. but the music sounds great so... *shrugs* :)

Paaf
Active member
Active member
Posts: 242
Joined: 2012-02-22 18:21
Location: Stockholm

Re: Paaf system

Post by Paaf » 2018-12-24 23:16

Merry Christmas!
48411886_282558465743560_4024915519252463616_n_.jpg
48411886_282558465743560_4024915519252463616_n_.jpg (34.8 KiB) Viewed 2033 times

tokenbrit
Very active member
Very active member
Posts: 899
Joined: 2012-03-22 19:47
Location: New England

Re: Paaf system

Post by tokenbrit » 2018-12-25 03:27

:-) And to you, Paaf. And to you :-)

Paaf
Active member
Active member
Posts: 242
Joined: 2012-02-22 18:21
Location: Stockholm

Re: Paaf system

Post by Paaf » 2019-01-05 22:57

I'm still gawking about the sound of my HAKAI after (temporarily) disabling Volumio. So niiiiice!

I also played a CD for the first time in ... several years! It's actually a Panasonic 3D BluRay player, so certainly it's neither very hifi nor optimized for tunefulness! I look forward to improve it with my recent new understandings!

Per A
Active member
Active member
Posts: 154
Joined: 2007-08-13 10:10

Re: Paaf system

Post by Per A » 2019-01-06 09:09

Hi Paaf

Thanks for sharing your interesting upgrades.

I have the same type of Qnap nas that you replaced. It is quite noisy in itself. It makes a low frequency sound that can be heard through the walls of our apartment. But what is worse is it is so slow that I hardly use it except for music I can’t find using spotify. It may be that I should rebuild the database or something tedious like that. Was your Qnap slow, did you have to wait several minutes after pressing music in kazoo for the folders to appear?

Paaf
Active member
Active member
Posts: 242
Joined: 2012-02-22 18:21
Location: Stockholm

Re: Paaf system

Post by Paaf » 2019-01-06 16:17

Hi! The QNAP was a bit slow but not as much as you describe. With a SSD it was completely quiet.

Paaf
Active member
Active member
Posts: 242
Joined: 2012-02-22 18:21
Location: Stockholm

Re: Paaf system

Post by Paaf » 2019-02-12 19:25

I went on vacation for a week, and after arriving home I fired up the hifi system. I got a total eargasm. OMG!

It certainly puts things in perspective. This time I was actually super satisfied for weeks. No need to modify anything!

It was only today that I went in to modify something, and ONLY because I got slight stuttering listening to internet radio. I went into the HAKAI and killed the Volumio processes, and that seemed to solve it. I suppose my buffer size 256 is a bit tight.

*happy*

Defender
Active member
Active member
Posts: 144
Joined: 2018-02-14 22:35

Re: Paaf system

Post by Defender » 2019-09-10 14:02

interesting to see that camping matresses from thermarest are also usable to improve musicality:)

Paaf
Active member
Active member
Posts: 242
Joined: 2012-02-22 18:21
Location: Stockholm

Re: Paaf system

Post by Paaf » 2019-09-10 15:20

Defender - nice catch. :) Don't start hunting Ebay for one though, its efficacy for musicality wasn't convincing!

Not that musicality is a very objective way to tune hifi... but it's still the most useful I've found. :)

Post Reply