Adjustable bandwidth for analog demodulators

[kpreid]

• In #104 we see a use case for adjusting FM receiver bandwidth — receiving APT signals using an external program.
• The “Raw IQ” mode (intended for similar purposes) and SSB mode could also have such use cases.
• HF SSB/AM reception often benefits from adjusting filters to cut out interference. (This is slightly unlike the others in that it involves narrowing rather than widening the filter.)

Add the feature of being able to, through the user interface, choose a different filter bandwidth, and implicitly higher output sample rates where necessary to support this.

[k9wkj]

just another use case for adjustable/pickable filters

as can be seen I could use a full 5Khz or maybe even 6Khz of bandwidth on the USB demod on the left
i would like to pass that result thru another program to see if i A. can decode it B. learn what it is and why.
Openwebrx has a very nice adjustable bandwidth feature, but using a rtl_sdr dongle it is a bit cumbersome to work with

[ofadam]

I like that ShinySDR allows you to move the center frequency once launched (OpenwebRX does not), but that missing bandwidth control is greatly desired!