Hello all, well I just got sdrsharp loaded to a new computer. i7 quad core with 6 gigs ram and running windows 7. Installed driver from zadig and updated all the computer drivers. When I open SDR and tune to a wfm fm channel it sounds like its cutting out every 100ms. So I changed the latency and it changes when it cuts out ie. 200 ms the sound cuts out every 200ms. It also sounds distorted even when adjusting the volume on the top. I have been using sdr for a while on my other computer with no problem. Any help would be great. Also using ver. 1331.
SDR# audio choppy
- Thread starter wildbillx
- Start date
- Status
How about a screenshot of your receiver settings -- Click on that Gear up top in SDR# and let us see what is says.
Mike
Mike
BM82557
Member
Also set it to FM Stereo by clicking the FM Stereo box.
I tried the stereo and also the will send a shot of the settings when I get home Sunday. I have been running sdr# for about 6 months on my other computer with no problems. The sound on any frequency sounds as if there is too much volume (gain too high) and it cuts in and out. Voice is almost illegible and music sounds warped. But watching movies and online scanners sound is fine.
You'll want the filter audio box checked in the audio tab. It will sound like hell without it.
Ok, so just started messing around with settings, not really knowing everything i was doing. When I change the sample rate to .9000001 MSPS the audio is a lot better and only cuts out every 10 secs for a split sec. ???? All other settings the same.
Click the filter audio box.
Also, click the offset tuning box.
ok, so here are the screen shots. .900001 is the one that works good, sounds good and doesnt cut out. the others get worse until illegible by 3.2. Distorted and sounds like slow motion. But my dual core hp with 4gb ram will allow me to run it at 2.4 without a problem???? Am I missing something.
Attachments
BM82557
Member
Yes, set the bandwidth to 180000 as was suggested in post # 5. 180000 is what I use for commercial FM broadcast stations.
At this point it seems like a computer issue, as if the processor is not able to keep up.
W5BFF
Member
That seems to be the problem I'm running in to.
...I'm thinking an external sound card may alleviate some of the CPU usage, since my onboard sound card PROBABLY shares processing with the CPU instead of having its own separate processor??
I guess that could be, but I think it is unlikely. I mean I don't htink it is worth it to get an external card. If you're running a multicore processor a couple years old or less, processor isn't the problem.
The processor is _not_ the issue in WildBillX's case. If WildBillX could post a sample wav of the audio output so we could hear what he is hearing, that might help us out.
Granted, 100 mhz isn't the prime FM band [at least not around here], but I would have expected to see other signals. The signal he is monitoring isn't very strong, and there aren't any strong signals nearby.
If he has to switch to .900000 to get anything, I have to wonder if it's a USB port issue. If I were WildBillX, I'd check to make sure my BIOS and that all relevant OS updates related to the USB subsystem were installed. The RTL dongles should not have a problem on any USB 2.0 or USB 3.0 port, but there might be an issue if the version of the USB drivers that are installed are crappy.
I'll give a scenario -- not really applicable here. I have an AirSpy, which needs to be able to test out at 20 megasamples or whatever. Depending on what else I have plugged into my USB subsystem, I can't get 20 MS out of the USB -- even on USB 3.0 superspeed ports.
Some computers have all of their USB devices running off of a single USB hub externally -- if you've got tons of stuff plugged into USB, including things with crappy drivers and things that operate on the high speed interfaces [like wireless AC cards and USB backup drives] it could be that the USB isn't keeping up.
In my particular case, I fixed my USB issues by updating to the latest Intel USB 3.0 drivers [he may not have an Intel system, he may not have USB 3.0 ports] AND by putting my Airspy and my USB backup drive on the USB 3.0 ports and everything else on the USB 2.0 ports.
I guess he could test by removing everything [at least everything possible] from the USB ports except for a single dongle. Then see if things sound better.
When I had my USB problems, everything looks great in the waterfall -- but the audio was garbage.
mike
WELL thank you for everyone helping. Ended up being Mtindor that made me wonder if the bios was up to date.... and it wasnt. After updating, sound is perfect up to 3.2. Thanks again even though I feel a little dumb with it being a damn update issue.
W5BFF
Member
Well don't feel TOO dumb! *I* didn't think of that, so that would make me dumb, too!
I'm trying to run a dongle on an eMachines AMD64 and WindowsXP... I guess I'm gonna need a new computer to run this thing??
...I know DSD completely hogs my CPU when it's decoding. I don't think there are any USB 3.0 ports on this old computer.
reconrider8
Member
sdr is a beastly hog on mine so much that without it running my laptop starts to lagg
- Status
