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Old 28th September 2011, 10:10 AM   #791
rsdio is offline rsdio  United States
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Location: Seattle
Quote:
Originally Posted by Painkiller View Post
That's an interresting configuration. Never seen an amp like that before. Is it a diy project, or is it store bought?
There is no amp in that picture. That is the input connector panel for a 3-way speaker. Linn has been making products for thirty years, sold in audiophile shops. They're quite keen on biamping and triamping speakers, so it is not too hard to disable or segregate the crossover to access individual speaker drivers within the same cabinet.

Linn - Music Systems - Komponent

I would be very interested to learn what filters, and slopes are most effective for the Komponent 104. Does the owner's manual mention frequencies, or do they consider it all proprietary?
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Old 28th September 2011, 10:54 AM   #792
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I was of course referring to the 8 channel digital amp in this post: Post #786

Interresting piece of gear
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Old 28th September 2011, 05:42 PM   #793
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Quote:
Originally Posted by Painkiller View Post
I was of course referring to the 8 channel digital amp in this post: Post #786

Interresting piece of gear
Hi the original thread
Full Digital / CrossOver / Multi Amplifier integrated

page
https://sites.google.com/site/koonau...8-full-digital

TAS5518 only: can do IIR 24db/Oct crossover.
Stereo Source -> TAS5518(4Way crossover) -> up to 4 Way Speaker

Now, with PC:
PC = Source, and FIR crossover
exaU2I = ASIO to I8S output
TAS5518 = accepts I8S, do nothing but amplify

I do not recommend DIY this amplifier. I spend some thousands and months.
If you want multi-way full digital Amplifier, try TAS5706.
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Old 28th September 2011, 05:49 PM   #794
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Quote:
Originally Posted by rsdio View Post
I would be very interested to learn what filters, and slopes are most effective for the Komponent 104. Does the owner's manual mention frequencies, or do they consider it all proprietary?
Owner's manual does not show the filter detail, but crossover frequency = 1kHz and 3.5kHz.
I used IIR 24dB/Oct filter before, Now using FIR (200dB/Oct or so).
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Old 28th September 2011, 09:36 PM   #795
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Default jitter

Quote:
Originally Posted by exa065 View Post
Hi Everyone,

I’ve been working on a new design for 8-channel Asynchronous USB to I2S interface. It started as a fun project and eventually became more involving than just a hobby. A couple of friends joined in and helped with the development of bit-perfect ASIO driver covering all sampling rates up to 352.8 kHz. At the present time I am testing it with a ES9018 DAC.

Here are the details:
• Sampling frequencies (kHz): 44.1, 48, 88.2, 96, 176.4, 192, 352.8
• Resolution (bits): 16, 24, 32
• 8, 4 or 2 channels for sampling rates up to 192 kHz
• 4 or 2 channels for 352.8 kHz
• Galvanic isolation between the USB ground and the I2S outputs.
• Two quartz oscillators for the 44.1 kHz and 48 kHz sampling rate groups
• FPGA implementation
• 256 kB FIFO buffer to support asynchronous operation
• Two analogue voltage regulators with filters
• Sample rate LED indicators
• USB power LED indicator
• Buffer level LED indicator
• Four I2S data outputs (8 channels) powered by the DAC power supply (3.3V or 5V)
• USB 2.0 interface, Mini USB connector
• Proprietary bit-perfect ASIO driver completely independent from the Windows sound system; No software volume control or mixing.
• ASIO driver implements automatic sampling rate switching; no re-sampling
• Works on Windows XP, Windows Vista and Windows 7.
• Tested with Foobar and J.River Media Center
• Project homepage – www.exadevices.com > Home

I am about to make the USB to I2S interface commercially available as a kit.

Any feedback is highly appreciated.
Hi!!!

could i know how much is jitter?
Have you measured it (with audio precision?) ?

regards

gaetano
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Old 30th September 2011, 09:13 PM   #796
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Hi exa065
I wrote 2 pages,
How to guide, for exaU2I and Reaper to build PC crossover
https://sites.google.com/site/koonau...-FIR-crossover

replacing ReaFIR to CUDA FIR
https://sites.google.com/site/koonau...hannel-divider
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Old 1st October 2011, 12:54 AM   #797
exa065 is offline exa065  Canada
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Quote:
Originally Posted by KOON3876 View Post
Hi exa065
I wrote 2 pages,
How to guide, for exaU2I and Reaper to build PC crossover
https://sites.google.com/site/koonau...-FIR-crossover

replacing ReaFIR to CUDA FIR
https://sites.google.com/site/koonau...hannel-divider
Hi KOON3876,
The first link appears to be broken. Can you post it again?
Could you tel us more about the performance of your system? Have you done any room measurements?
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Old 1st October 2011, 12:58 AM   #798
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Hi exa065
sorry here is the URL,
https://sites.google.com/site/koonau...-FFT-crossover
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Old 1st October 2011, 01:58 AM   #799
exa065 is offline exa065  Canada
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Quote:
Originally Posted by ulanbatorr View Post
Hi!!!

could i know how much is jitter?
Have you measured it (with audio precision?) ?

regards

gaetano
Hi Gaetano,
More than half of this thread is about jitter. Please check post 165 on page 17 and post 211 on page 22 for jitter measurements and calculations.
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Old 2nd October 2011, 06:30 PM   #800
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Quote:
Originally Posted by KOON3876 View Post

Koon, thanks so much for the guide.

I΄m teribly newbie regarding Dsp so please bear with me but:

Which possibilities exist in Reaper for creating different types of crossover functions (different orders, different types (butterworth, Linkwitz etc.))

(briefly checked the Reaper site, didn΄t find info specific on crossover function).

Thanks, Finn
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