Jeno1

Hi all!

My setup consists of a Philips LX3900SA DVD player (with built-in 5.1 amp +
Dolby PL2 and SPDIF input) and a Creative Audigy card.
Recently I've replaced the small factory front speakers with a good old pair of
60W RMS Pioneer speakers.
The sound got better, they are much louder but I've realized that the amp is
a bastard and I have no ability to change the LFE's crossover freq.
Now using Winamp and an SPDIF cable transmitting a simple stereo audio everything
under ~120 Hz is routed to the bass channel.
That is unefficient because:
- the front speakers are able to deliver at least 50 Hz (<-3dB)
tried it with Soundforge synthetizing simple waveforms and connecting one of the
speakers to the bass output of the amp
- the sub has much higher load because it has to produce much wider spectrum than
it should

My goal would be to route only freqs <60 Hz to the sub, so it can concentrate on the
really deep ones while the Pio fronts would deliver everything above that.

So I've googled a bit and found this ASIO thing and thought maybe it's possible
to use a software to do a realtime Dolby PL2 5.1 upmixing while routing only the
real deeps to the sub channel, encoding the whole stuff as an AC3 stream and
transmitting it to the amp's SPDIF input.

I'm not sure whether it would do the trick but I'm curious (I have no $$$ to buy
a new amp that would do this for me... ) and I hope that using a 5.1
input with real 6 discrete channels I could bypass the built-in crossover
- since it's a D-class digital amp everything is software based and I hope that
the crossover works only if there is no separate sub channel in the input.

I've heard that ASIO can manipulate the output sound "realtime" but I have absolutely
no experience on both the technology and the softwares that could use it.

First question: do you believe that it possibly does the thing I'd like to?

Second one: what would you advise me on the subject? Which SW shall I install,
what settings to make, etc...


Thanks for your replies!

dj_stick

your satellites might be able to produce 50hz, but it doesn't mean that they should… a crossover frequency of around 80hz is probably more desirable - the less power soaked up by the low frequencies will give you a cleaner mid-high range in the satellites.

now as you have an Audigy card, KX will allow you to set your own cross-over frequency from within the driver, no need to mess around with extraneous software/apps.

As for using AC3, the only way to do that would be to use a software encoder, not the best option - if your amplifier has discrete analogue inputs - use those

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