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Thread: FM/DAB digital radio - THAT WORKS!!

  1. #661
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    I received my unit last friday, nicely packaged, but no instructions what so ever (even if I didnīt need them).
    This will be resolved shortly. We will be emailing out this on purchase and on dispatch.

    About the standalone software still, first time I started it, it switched from on to off all time until I manually clicked the on/off button. I believe I used the latest version, http://www.craigbrass.net/standalone.zip, downloaded on friday. Didnīt test more than one start.
    Known issue. Will be resolved in the next build.

    The plugin for RR, is it included in the latest release already?
    The latest version of RR includes this plugin out of the box.

  2. #662
    Constant Bitrate tom_rosenback's Avatar
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    Quote Originally Posted by craigbrass View Post
    This will be resolved shortly. We will be emailing out this on purchase and on dispatch.


    Known issue. Will be resolved in the next build.


    The latest version of RR includes this plugin out of the box.
    Very good! Thanks!

  3. #663
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    Tom, there is an issue with the RR plugin for this device when resuming from hibernate. I'm sure if you PM Mitch he'll sort you out with a fixed version.

  4. #664
    Constant Bitrate tom_rosenback's Avatar
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    Quote Originally Posted by Wolvers View Post
    Tom, there is an issue with the RR plugin for this device when resuming from hibernate. I'm sure if you PM Mitch he'll sort you out with a fixed version.
    Thanks for the info!

  5. #665
    Constant Bitrate soyfish's Avatar
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    Couple of points after using the plugin for a few days ...

    1.
    My CF is muted (att) on start up, I'm sure this is a setting in CF somewhere, but the point is that I can hear the radio very quietly working as windows & CF starts up. It's like its working straight from boot, rather than when it's turned on via the plugin. I have windows set to shut down and start up, not hibernate. Once I get into CF and press the on/off button it goes off and then quiet.

    2.
    I went into the ultimate radio plugin and turned the radio off, so I could play some MP3s, once I pressed play on the MP3 file I wanted, the radio started. I went back into ultimate radio and turned it off again, went back to the MP3 and played it - all ok. Not sure what happened there. It's only happened that once so far.

    3. That particular MP3 I was playing, I cranked the volume right up (was blasting a bit of "Them Crooked Vultures" ) and then the computer-y Morse code noise I had before maxing the unit's volume came back. Would have cranking the normal volume up have some how adjusted the internal volume of the unit?

    I have to do some more testing on these points and see where I come to.

    Also, on my reception with the mast antenna - I have noticed that around town (trees, built up areas) I get quite a few drop outs. Hard to say if it is the antenna or the half transmit strength here. I'm sure the transmit plays a big part. I'll probably be in Melbourne in a month or so to test somewhere on full Tx.

    Cheers

    EDIT: I read back and noticed the "reset to full" option for the volume, I will check this when I am on the car tomorrow morning in relation to my third point and see if it helps.

  6. #666
    Constant Bitrate soyfish's Avatar
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    Quote Originally Posted by craigbrass View Post

    Known issue. Will be resolved in the next build.
    I had this on/off thing happen once with the CF plugin as well - assume it will be sorted in the CF plugin as well soon.

  7. #667
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    That problem will be fixed in the new build too.

    As for your problem in built up areas, was this in DAB+ mode? If so, which aerial / antenna are you using?

  8. #668
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    @Wolvers

    Hi

    Regarding your interference issues, you are comparing with the Silabs, but from my understanding (I don't own one), the SiLabs has a built-in 'sound-card' - i.e the sound from the Silabs enters the PC digitally via the USB connector?

    This is obviously totally different to the DAB radio's being talked about in this thread. In the case of these, the audio travels along a 3-5mm<-->3.5mm stereo cable into whatever soundcard/chipset happens to be installed in the carpc.

    The interconnect mechanisms, and thus resulting interference issues are not comparable.

    For the record, I am using an asus xonar external USB sound card, together with a 3M 3.5mm<-->3.5mm cable between the radio and line-in input on the soundcard (length due to lack of space to fit close together!). I'm not having any interference issues.

    I have no ferrites on the audio cable, and the cable is just a Ģ2.99 thing from Kenable off ebay.

    I did have quality issues originally when I was using both the built-in sound card (Infill G4), and a Ģ4 ebay USB soundcard. These problems included no bass and interference. Are you definately connected to a line-in socket rather than a mic socket, and if its one of these dual-use (configurable line-in/mic) sockets, is it definately set to line-in?

    Maybe you can buy/beg/borrow a USB sound card (with line-in) to test?

    The car is a horrible environment for a PC so one can't expect zero issues for everyone.

    Nigel

  9. #669
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    Hi Nigel,

    Thanks for your input, and I'm glad to hear that you are not having any interference issues. You are correct that the Silabs is a completely USB device and as such is less susceptible to interference. The comparison was just a thought process to prove that the aerial (same one connected to both tuners) is powered and grounded properly. If it wasn't then the silabs would have little or no signal, where in fact it is much improved.

    In actual fact the source of the noise has been found today, with the help of the electronics engineers that I work with. It's related to the fact that the aerial's ground is much better than that of the USB bus which causes the Venice7M to use the aerial as a ground, making a very large ground loop. I have proved this by disconnecting the ground from the aerial but keeping the signal connected, this forces the Venice7M to use the USB ground as it should and removes all noise. We intend to try to cure this by making an adaptor for the aerial that includes a capacitor, around 1 to 10nf, on the ground side. I believe this is similar to how the RF signals are handled on TVs.

    I suspect that people who are not having any issues have a matched resistance (or should that be impedance?) on the grounds of their Venice7M.

  10. #670
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    Hi

    That will be useful info for anyone else with similar issues. With all the power conversion that does on within a PC before juice arrives at the USB output, I guess its hardly surprising that its not a perfect ground! In the primary application for the Venice chips (home/portable dab radio's), there wont be any second ground via the aerial screen, and, of course they'll be in a much kinder environment!

    You may wish to try connecting you unit via a powered hub. Without all the gubbins inside the PC, the ground on a powered hub is probably much better than that available at the PC, while also tying down the PC's USB ground to something better. Or, simpler still, just connect an earth strap from the PC's chassis to a decent earth (batt -ve) point - the currents flowing in this should be minimal.

    This also explains why only a few people are having noise issues - not all PC's are built the same, and it will only effect those with a chassis-grounded aerial (not windscreen/magimounts etc)

    You might be able to see the noise on a 'scope connected between aerial ground and USB ground (with the scope lead screen connected to the 'best' ground (i.e the aerial). If both grounds are relatively poor, then you might see nowt - or require a differential 'scope to see owt.

    Nigel

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