Hi, I'm about to move house and the new property requires a complete rerwire, so I plan to take the opportunity to install audio and video cabling. My questions a Is there any literature available on fibre for audio? I would like to gain some understanding of it - light levels both xmit & rx.

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Just started to get an earth loop using my laptop as source connected to amp. just starte get 'cricket' type sounds when the laptop is connected to power lead. problem goes totally when i half remove the power lead, gets unlistenable when the power lead is removed and laptop running on battery. only just started happening, any ideas?

As subject line - need a sound card that gives a bit-perfect output on SPDIF (optical or co-ax), either a PCI or USB device. So that rules out Creative I guess? Any suggestions? -- Squirrel Solutions Ltd Tel: (01453) 845735 http://www.squirrelsolutions.co.uk/ Fax: (01453) 843773

For ages, I've had one speaker louder than the other. At first I thought it was my turntable, but the problem persisted with other sources. Swapping speakers made no difference, so I thought the amp was faulty (Arcam AVR350). But what I didn't realise, is that the speaker settings (for the 5.1 surround option) also affects stereo, even when the amp is set to 'direct'. A quick adjustment there...

A few days ago someone posted info on finding the BBC Test Card (sorry, deleted OP). Would have been handy a couple of weeks earlier, when I was discussing with a retailer the fact that my new Toshiba recorder had lousy definition and distortion. Resolved satisfactorily once I got to an engineer ("Yeah, software problem, we get loads back") rather than a salesman ("No, Sir, they never go...

Why is optical media so efffing ****e ? ? Will transcribe ASAP. Graham

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Hi guy. I know you don't like this sort of thing but I used to be a kind of regular here, so I'm posting an ad for my much loved NS1000M's. I first found out about these on this group, now it's time for them to move on. C'est la vie. http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=260260258397

I often see texts that imply or state outright that ringing in time-domain audio waveforms, usually associated with time-domain discontinuities, is to be avoided. I wonder what is the basis for this. For example, if you take a perfect square wave with all of its harmonics, and mathematically remove all of those above a certain point you will see a waveform with ringing. I think this is...

I came accross this manufacturer http://www.h-cat.com/ The technique sounds convincing but the technical explanation is way over my head. Has anyone experienced this brand and could an expert type have a look at the bumf, and give a verdict, does it make sense or is it a solution to a none problem? Ta.

Just curious - as there seem to be some pretty highly knowledgable people on this NG, dooes anybody know anything of Ben Duncan? Produced some rather good plans and kits in the 70's and 80's - I'm still using his AMP-02 which was marketed by Audio Synthesis; I built it probably about 1990, maybe earlier. I heard he had given up the domestic scene and moved into stadium concerts and so on....

Hi, Thnking about replacing my very old Cambdge amp and Ditton 44 speakers. Up to around £1500 to play with. Thinking about the B&W 863 speakers and no idea about an amp. Thoughts please Thanks, Gordon

Someone has managed to reverse-engineer HDCD encoding: http://www.srcf.ucam.org/~cjk32/hdcd So now it's easy to decode an HDCD to a 24-bit file and see whether each track has 'Peak Extend' and/or 'Low Level Range Extend'. Looking at a few (King Crimson) CDs last night, only three had 'Peak Extend' of which none actually needed it as they wouldn't have clipped anyway. Any volunteers to correct...

Just got an HD satellite receiver. My TV has a DVI-D input but the box a HDMI one so had to spend a fortune on a lead. And of course another for audio. Connecting the analogue resulted in audio a lot lower than everything else - despite the box output being on max - so I tried the SPDIF, same thing. How come makers agree on picture levels but not audio? Also, anyone know a source of short...

Long time lurker of all the audio groups here. I have seen mention of his name here and there but haven't seen him post in years. Does anyone have any non rumour/solid information about what happened to him? He was an interesting chap that rubbed a few the wrong way but had some interesting things to say and teach. I am not abashed to say I miss his postings, I hope life finds him well.

Has anyone read the article "Dirty Digital" by Noel Keywood in July's "Hi-Fi World"? I picked up a copy for some amusement during a journey yesterday and was stunned by the article's technical incompetence. Keywood says of CD that "dynamic range is limited to 85 dB or so by dither noise" (incorrect - it's actually about 93.3 dB IIRC for 2 LSB p-p of TPDF dither). Then he complains,...

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Does anybody know anything about this 12 inch loudspeaker? It is in my guitar amplifier. What is it worth, and is it any good? 8 ohms Thanks