Finally, music we can buy in 768 khz sampling rates.

[mhardy6647]

see answer above

It's a digital analysis of the file, no playback involved. I doubt Matlab is picking up stray radio signals.

 

[mansr]

I see from @KSTR post that it's actually 153.6 kHz. That really looks like a radio signal.

I don't see how you're getting that figure. The frequency is actually a little lower than 150 kHz, and it's falling throughout the recording, as can be seen in this spectrogram.

 

[sonitus mirus]

I see plenty of DC-DC stepdown converters with a switching frequency of 150kHz +/- 10-15%. Would a 24V/12V to 5V (for USB) power supply for something like a Raspberry Pi possibly cause this type of signal to appear?

 

[radix]

I don't see how you're getting that figure. The frequency is actually a little lower than 150 kHz, and it's falling throughout the recording, as can be seen in this spectrogram.

I was looking at the plot in post #75. Did I misread that graph?

 

[danadam]

I was looking at the plot in post #75. Did I misread that graph?

That's impulse response of his filter, not spectrum of the file. The x axis is a sample number.

 

[Blumlein 88]

I don't see how you're getting that figure. The frequency is actually a little lower than 150 kHz, and it's falling throughout the recording, as can be seen in this spectrogram.

View attachment 176496

This is also what Audacity shows. With the left channel being lower in level than the right channel at just under 150 khz.

 

[radix]

That's impulse response of his filter, not spectrum of the file. The x axis is a sample number.

Yes, I see that now. I edited the 153.6 khz post and crossed it out.

 

[mhardy6647]

So I guess the question is whether this is high fidelity.

 

[krabapple]

Non one ever went broke overestimating the gullibility of audiophiles.

 

[mhardy6647]

Non one ever went broke overestimating the gullibility of audiophiles.

Well... maybe,but I dunno... I think that "laser turntable" product has been introduced and then died in a sea of its own red ink a couple of times now...

ELP Releases New Laser Turntable

Twenty years after the introduction of the original, ELP has released a new needleless record player. It features a champaigne gold aluminum case and weighs a hefty 23 kg. The back panel features RCA and XLR analog outputs, while 5 lasers lurk under the hood. Why five? Well, two are used for...

www.retrothing.com

 

[pkane]

First 3 minutes, log scale:

 

[Killingbeans]

Yeah, I like good old 16bit/44.1KHz just fine, and this doesn't exactly convince that I need more. Especially since I can't hear diddly above 16KHz.

 

[voodooless]

So here is a clip of about 30 seconds from the middle of the sample song, once the original, and a second one is the Redbook version, made from the original. Dynamic noise shaped dithering is used for the downconversion. If people want to do some ABX on this, please let us know the outcome. I don't have a 768 capable DAC, so I can't test this The link will only be active for a week, after that It's gone. Don't ask me to post it again.

Here are some of the stats as well, from Audition 2022, for the original:

And from the Redbook version:

The Redbook version seems to have about 6dB less dynamic range, but the perceived loudness is about the same. Good luck!

 

[Sound Liaison]

Adobe Audition opens the file just fine and let's me do a notch filter at 150 kHz without problems:
View attachment 176415

Hi Voodooless
Frans has fixed the 150 kHz peak with the Adope Audition program that you suggested. The program can't play the 768 file but can indeed smooth out the peak. Thanks!
We have exchanged the free track with the "Adobe repaired file".
How does this look?
And how does it sound?
Greetings Peter

 

[voodooless]

Frans has fixed the 150 kHz peak with the Adope Audition program that you suggested. The program can't play the 768 file but can indeed smooth out the peak. Thanks!
We have exchanged the free track with the "Adobe repaired file".

Great, nice to see that you've actually put in the effort to fix this!

 

[KSTR]

So here is a clip of about 30 seconds from the middle of the sample song, once the original [...]

For the fun of it, I highpass-filtered the original at 20KHz (12th order) and reduced sample rate to 192k, then downsampled to 48k (for space, also I used only some seconds around the drum fill in the middle section of your snippet, and left channel only), and finally a 20dB boost before saving as 48k/16bit.

This exposes what's going on above 20kHz - 160kHz (which now is 2.5kHz - 20kHz). Drum attacks (snare and two toms) and the sizzle ride cymbal is what sticks out pluse some sibilants of the voice (the low-frequency "grunt" is tonal content of the voice).

 

[Killingbeans]

How does this look?

Pretty

And how does it sound?

How a spike at ~150KHz vs. no spike at ~150KHz sounds? Who can tell? How many of your customers have headphones/speakers that goes flat to 150KHz and beyond? And how many of them have the ability to hear anything significant above 15KHz or even 10KHz?

 

[mansr]

How does this look?

Before:

After:

 

[Davidpurton]

Yes, proper 768 khz music. From Sound Liason which does make very high quality recordings. I'm not aware of commercial offerings at this rate before though maybe I just missed a few. Alas it is only 24 bit instead of proper 32 bit recording.

Carmen Gomes Inc. - RAY! | High Resolution Audio Downloads at Sound Liaison

Buy Carmen Gomes Inc. - RAY! and other great high-res downloads from Sound Liaison. All audio formats just starting from €17.95.

www.soundliaison.com

You can download a free sample track which clocks in just under a gigabyte in size. Pleased to see if you've purchased it at a lower rez, they offer to deduct the cost of that from buying again in the higher rez format. Of course they are transcribing the master tapes from their Studer A80 RTR.

Here is a quote from a promotional email as I'm on their mailing list.

​ ​

Ray! in 768kHz

The RME company is highly regarded by audio professionals. Before we started working with Merging, RME was our converter of choice. So when we got offered to test the RME ADI-2 FS, a compact 2-channel AD/DA converter we gladly approved. The first comparison with our Merging Anubis was immediately positive. Lots of definition, a beautiful soundstage with perfect placement. And after powering it with the Ferrum Hypsos external power supply, a sense of calm and control was added to the experience. This is clearly a serious converter. The RME has a maximum sample rate of 768kHz. To really see what the RME ADI-2 is capable off, we created a 768kHz/24bit file straight from our Studer A80 tape recorder playing the ¼" reel to reel master tape from our latest release. Listening and A/B comparing with the Studer the result is quite convincing. In our opinion the sound is very close to the analog master tape. We would like to share the results with you. Therefore we have made one 768kHz track from the album available for free for a limited time period. The only favor we ask in return, is that you give us a bit of feedback; Is this a way forward? Do you also hear an even greater sense of realism compared to the lower formats or are you perfectly happy with the formats you have been using so far? For anyone who would like to purchase the entire album in 768kHz but has already purchased the album in a lower resolution in the past week, the price difference will be refunded. Send us an email and you will receive a refund within a few days. Happy New Year and best wishes! The Sound Liaison team; Frans & Peter

Guilding the Lily of course. There is little point, as we know, in going above 96kHz which allows a filter at 48KHz...well above audibility by a country mile.

It's specmanship like camera pixel count...pure marketing.

I have an RME ADi-2, well two of them...they are 192Khz. With human hearing drooping hf sensitivity with age, and never really above 20kHz, and more like 15kHz if your middle age upwards, makes a mockery of these super fast chips. Pointless except "keeping up with the madness"...and making money.

 

[Sound Liaison]

Hi David
If we were in this business for the money, we would be better of making a different type of music.
Jazz is not very popular.
And giving away free samples does cost us.
Amazon are charging us per download.
Our "goal is to build a bridge (liaison) between the studio (engineer and musicians) and the people who love to listen to beautiful music using high quality audio equipment. Next to standard studio recording sessions they organize special recording sessions with a live audience" see About us
This is the reason we dare be on this forum, "building a bridge."
The first time we made a profit, we, after having paid the bands their royalties, used the money to buy a stronger computer in order to record in 352khz.
The 2nd time we invested the money in our first Josephson microphone.
3rd time we bought our Merging.
Last year we bought one more Josephson in order to experiment with surround and "one mic +"
recordings.
It is a passion for sound and jazz that drives us and unfortunately very much a
"don't give up your day job" situation.
I work as a musician and teach bass and jazz ensemble at MSA here in Amsterdam.
Frans works fulltime as an audio technician, partly for the Dutch radio making radio plays but also freelance recording all kinds of music. From classical to pop and music for children.
The reason for high resolution is that when we increase the sample rates the smoother the samples get in the audible spectrum, much closer to analog.

Greetings Peter