|Subject:||Re: [Discuss-gnuradio] audio sink issue|
|Date:||Mon, 15 Dec 2014 13:57:22 +0100|
|User-agent:||Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0|
the frequency translating FIR translates and then filters, ie. it moves your baseband signal to -19kHz and then filters a 1kHz band around 0Hz -- thus cutting away all your signal.
By the way: I assume you want to produce sounds at 19kHz with your built-in sound card: you won't hear much  unless you're very young, and your sound card has wide filters -- most cost-conscious soundcards will simply have only exactly one very simple analog filter with a cutoff frequency around 20kHz, and don't pay much attention to a narrow transition width, since humans won't easily notice attenuation in frequencies they can barely perceive anymore, and most speakers won't be linear at high frequencies, either.
On 12/15/2014 01:08 PM, sreena p h wrote:
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