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Old 17th December 2012, 11:16 AM   #411
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Default Digital and analog on AS2.100

Hi,

I searched this thread but without finding anything. I have two questions:

1. Is there anyway that two AS2s are synced clockwise? I read a review ([Review] Hypex AS2.100 active speaker module - [English]) where the reviewer pointed out that soundstaging and image focussing was not on par with the overall quality of the modules. This could be an issue of poor filter definition in his application - or it could be a problem of high jitter and no proper clock syncing of the dsp.

So I wondered about that.

And if so, would analog in be sort of a "workaround"?

2. Can the analog in be modified in order to accept a bona fide balanced connection? As I guess, internally the topology is balanced anyway...

Thanks,
Achim
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Old 19th December 2012, 10:22 AM   #412
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Quote:
Originally Posted by diyAchim View Post
Hi,

I searched this thread but without finding anything. I have two questions:

1. Is there anyway that two AS2s are synced clockwise? I read a review ([Review] Hypex AS2.100 active speaker module - [English]) where the reviewer pointed out that soundstaging and image focussing was not on par with the overall quality of the modules. This could be an issue of poor filter definition in his application - or it could be a problem of high jitter and no proper clock syncing of the dsp.

So I wondered about that.

And if so, would analog in be sort of a "workaround"?

2. Can the analog in be modified in order to accept a bona fide balanced connection? As I guess, internally the topology is balanced anyway...

Thanks,
Achim

Hi,

1. It is not possible to sync both dsp clock but I also don't see how this could help. Do you think that with synced clock the audio performance will get better?

2. No, the module only has an unbalanced input. Only the PSC2 series have balanced inputs.
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Old 19th December 2012, 10:49 AM   #413
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Hi Matthijs,

I don't know - I was just wondering what caused that strange phenomenon of dispersed sound location the reviewer experienced.

I will only be able to check for myself in the coming weeks, when I will be building a system with 2 AS2.100s using Manger Schallwandlers as fullranges from roundabout 300 Hz upwards. These drivers will certainly reveal if the AS2s can produce focussed imaging or not...

I have also found a DIY report using ONE AS2 in stereo configuration and a fullrange driver being VERY ENTHUSIASTIC about the focused imaging.

I assume that good image focussing is dependent on both channels having perfect time-alignment. In studio work, when using several independent digital processors, using a masterclock and synching the devices (mostly BNC-connection) is mandatory in order to have sample-perfect processing across the units. Without masterclock, the system tends to smear the sound... And the SPDIF connection between two AS2s is no good provider of stable clocking.

That's why I asked if analog in is sort of a roundabout, like just letting everything go its route timewise instead of introducing SPDIF-related jitter ...

I am curious to see how that works out with my AS2s. I will try both analog and digital.

Further down the road, once your long-awaited multichannel DSP becomes available, there will be an alternative. For now I went for the all-inclusive package...

Thanks,
Achim
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Old 8th February 2013, 02:13 PM   #414
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Default My experience / DLCP question

Hi Matthijs,

just to let you know:

After using the AS2.100d in my Manger project my impression is that, indeed, not implementing a masterclocking mechanism that two modules can use for syncing degrades stereo imaging considerably.

This is a real pity, as the DSP chip used offers a means for implementation:
http://www.analog.com/static/importe...s/ADAU1701.pdf (cf. p. 18).

My listening experience is that one module on its own delivers amazing quality which far exceeds the price tag of the AS2.100. But add a second module for stereo and use the digital in, the soundfield is everywhere and nowhere. Resolution and drive is still there, but the left and the right channel just don't come together.

The situation is improved by not using the digital ins, but the analogue ones instead. Imaging becomes better, resolution is reduced though. Still, analogue in is the only way, for me, of sensibly using two modules.

A pity, really. So, on to the DLCP. I assume that all DAC stages in the DLCP are masterclocked? Could you please confirm this?

Thanks a lot,
Achim
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Old 16th March 2013, 04:22 PM   #415
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Hi Matthijs,
Do you solve the issue with USB protocol on AS2.100 to run them directly with MP3/iPod players?
Thank's
Petre
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Old 18th March 2013, 07:45 AM   #416
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Quote:
Originally Posted by petre.del View Post
Hi Matthijs,
Do you solve the issue with USB protocol on AS2.100 to run them directly with MP3/iPod players?
Thank's
Petre
Solve? The AS2 USB connection is only capable of communicating with a socalled "host" e.g. a PC, no USB mass-storage devices can be attached.


Quote:
A pity, really. So, on to the DLCP. I assume that all DAC stages in the DLCP are masterclocked? Could you please confirm this?
Yes, all 6 channels on the DLCP have the same master clock.
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Old 29th March 2013, 08:20 AM   #417
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Does anyone have any experience in controlling digital inputs such as volume and input selection using a conventional rotary potentiometer?
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Old 29th March 2013, 08:37 AM   #418
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Analog input on a microcontroller.
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Old 29th March 2013, 09:31 AM   #419
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Quote:
Originally Posted by Tekko View Post
Analog input on a microcontroller.
Can you expand and maybe link to anything I need to look at as this isn't my area of expertise I'm afraid. It was specifically related to the AS2.100 controlling it's volume with one input and input selection with another, similar to a conventional amplifier with rotary controls.

My thanks

Last edited by smallangryboy; 29th March 2013 at 09:36 AM.
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Old 5th May 2013, 01:43 AM   #420
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exellent response , which speaker is that?
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