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Spectrum Analyzer recommendation

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bsgd:
Hello folks,

I've been wanting to get a Spectrum Analyzer for years, but I never found something 'cheap' enough that could fulfil my needs at the same time that I had the money to spend. By cheap I mean something below $1K.
I mostly work with audio stuff, so I need frequencies from 10Hz to 50 or 100kHz basically. I would also like to find a lightweight device because I would need it shipped internationally since here in my country theres no way I can find such instrument.
By lightweight I mean something that doesnt weight so much that simply cant be shipped anywhere.

I have been looking at a HP 3580A for some time but I couldnt find any for sale. What would you guys recommend?

Thanks.

Bored@Work:
I have seen solutions with high-end soundcards or DAQ hardware plus software for PCs. Some of the PC software was even free software.

ejeffrey:
For such low frequencies, have you considered a sound card based audio spectrum analyzer?  It is hard to beat free.  What are your requirements?

olsenn:
Or even a DSO with fft (granted it probably isn't as responsive). Personally, I am thinking of buying the new Rigol DSA815 which goes from 9KHz to 1.5GHz and is only $1500. It looks to be pretty good so far by the specs.

olsenn:
Here's the link: http://int.rigol.com/prodserv/DSA800/

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