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Old 26th July 2007, 11:56 AM   #21
graaf is offline graaf  Poland
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post scriptum

a review of a three-channel version of Stereolith (monaural from around 2 kHz and up):
http://magazine-audio.com/essais-hi-...intes-hi-fi/22
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Old 26th July 2007, 12:09 PM   #22
graaf is offline graaf  Poland
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Quote:
Originally posted by fcserei


I totally agree with you. I'm using a dsp, not a barrier, which makes life much simpler. I'm just shaking my head when they are talking about "fidelity", and "reproducing what is on the record" in stereo reproduction.

And I totaly agree with You and with sunshinedawg's comments

the fact that people stick to conventional stereo triangle is for me something that can be explained only by force of habit and/or plain ingorance of the alternative options and/or conceptual inertia of audio industry and market

the latter being most probable explanation IMHO
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Old 26th July 2007, 02:17 PM   #23
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Quote:
Originally posted by poldus
I use a yamaha ax1 hall effect for ambience. Ive tried jvc-xpa1010 but it was not good enough. The ax1 is so good I just bought a second unit so I can have 8 ambience speakers as advised by Ralph Glasgal. In my experience ambience should be 15db below the main speakers.
Does this unit do the dsp and amplification in one box? Can it do more spaces than Hall or do you just use that for everything? I wonder if there is a unit that does everything in the digital domain so I can use digital amps?


Quote:
Originally posted by poldus
The front ambience channels in the ax1 are different from the rear ones. They basically provide early reflections.
Ok, thanks for the info. Do you know if this pretty much is the same with dsp's like the Yamaha and others that process a front and a rear channel, the front is automatically the early reflection and the rear is reverb? You don't have to do any configuration except place the speakers in the proper places?
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Old 26th July 2007, 02:25 PM   #24
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I'm using the Yss-901. The only source I kow is the Sony SDM-N50 LCD monitor. You can use the audio board of the monitor. I have one installed in a Behringer DEQ, and 2 in a panasonic digital receiver.
I've tried the pc (RACE), but i did not like it, besides I also don't want the complications of a pc in my listening setup.
An other possibility is the Creative Soundworks ps2000 (cheap) ot the new TACT (expensive).

The barrier method is foolproof, but I'm quite satisfied with the DSP. Sweetspot is reasonable and because of the "sound field completeness" you don't feel at all that your head needs to be in a vice. But of course it is still a one man show.
The only problem is that the stereo dipole speaker pair has a veird off axis combined response (just like the stereo speakers has veird on axis - sweet spot - response ), so a dead room is a must. But if the room is dead, you need ambience, which is a requirement anyway. (Stereo can only work if you have a big room acoustically close to the recording venue and you are in the farfield.)

I've found the double stereo dipole (one in front of you and one playing the same signal behind) better than the single. It really helps to detach hf signal from the speakers, which is a problem even with the barrier. It is also much more tolerant to head movements.

I'm experimenting now with a version of OPSODIS, tweeters are at +-5 deg, mids at +-10 and woofers to the sides. The experiences are very positive.
I use 8 channel ambience too (3 XP-a1010), one pair for early reflections, 3 pairs for rear and above.
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Old 26th July 2007, 02:34 PM   #25
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Quote:
Originally posted by poldus
I use a yamaha ax1 hall effect for ambience. Ive tried jvc-xpa1010 but it was not good enough. The ax1 is so good I just bought a second unit so I can have 8 ambience speakers as advised by Ralph Glasgal. In my experience ambience should be 15db below the main speakers.

It depends. If you have a good distribution of the ambience speakers (diamond or cube shape for 8) and the speakers have no apparent distortion, you can increase the ambience level surprisingly high. The real purpose of the main stereo dipole is "only" to position the instruments in the soundfield.
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Old 26th July 2007, 03:18 PM   #26
Nordic is offline Nordic  South Africa
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Elias, how big is your e-mail mailbox...?

I have a song by Mr Scruff, I think was done in ambiophonics, but it is about 5mb in size... if it is big enough, just hit my e-mail button below so I can have the address to send it to.
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Old 26th July 2007, 05:46 PM   #27
poldus is offline poldus  Europe
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Quote:
Does this unit do the dsp and amplification in one box? Can it do more spaces than Hall or do you just use that for everything? I wonder if there is a unit that does everything in the digital domain so I can use digital amps?
The ax1 includes amplification. There are different hall and church modes with parameters that you can adjust. No need to set specific parameters for front versus rear speakers except volume.
Using cds as a source it all stays in the digital domain (using the digital input). For sacd you need to use the analog input so you are converting twice (bummer). However, Ive been listening to multichannel sacd for a long time ( three years) and have to agree with Mr Glasgal that recorded ambience is not as good- there is too much direct sound captured by the rear microphones and it is not believable in the long run. The ambience channels in the ax1 have no direct sound whatsoever and have a real-like quality that multichannel sacd does not have despite the higher resolution.
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Old 26th July 2007, 06:12 PM   #28
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Quote:
Originally posted by poldus


The ax1 includes amplification. There are different hall and church modes with parameters that you can adjust. No need to set specific parameters for front versus rear speakers except volume.
Using cds as a source it all stays in the digital domain (using the digital input). For sacd you need to use the analog input so you are converting twice (bummer). However, Ive been listening to multichannel sacd for a long time ( three years) and have to agree with Mr Glasgal that recorded ambience is not as good- there is too much direct sound captured by the rear microphones and it is not believable in the long run. The ambience channels in the ax1 have no direct sound whatsoever and have a real-like quality that multichannel sacd does not have despite the higher resolution.
There seems to be a bunch of different Yamaha models. The dsp-1 and the dsp-3000 are just processors, no amp. Then there are the amplified units Ax1, ax2, a1, a2 and there are a bunch more. Is there any reason you went with the ax1?

What I meant was a dsp that input the digital from a cd player, did the convolution and output a digital signal that I could use with my pure digital panny sa-xr45 amp. Thanks for all the great info.
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Old 26th July 2007, 06:14 PM   #29
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Quote:
Originally posted by poldus


The ax1 includes amplification.
I was flirting with the ax1 for a long time to put the DSP in it and have an one box solution, but the ax1 is mixing the center channel in the analog domain if you want the phantom center.
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Old 26th July 2007, 06:20 PM   #30
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Quote:
Originally posted by fcserei


I was flirting with the ax1 for a long time to put the DSP in it and have an one box solution, but the ax1 is mixing the center channel in the analog domain if you want the phantom center.
Do you mean puting the yss901 in the ax-1?
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