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About borjam

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    Bilbaina Jazz Club
  • Interested in Sound for Picture

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  1. I am not affiliated in any way to RF Explorer, but there is some important aspect that would make me avoid the TinySA. Fortunately they are honest (a rare quality these days!) https://tinysa.org/wiki/pmwiki.php?n=Main.Limitations Specifically: The high input (240MHz to 960MHz) has very limited image suppression and only one level optional built in attenuator which makes it difficult to interpret complex signals. Which means: unless you have a couple of attenuators in hand and maybe a filter or two it might give very misleading readings and lead you t
  2. Exactly. License exemption doesn’t mean absolute lack of regulation. For example, you don’t need a license to deploy IOT sensors using LPWAN technologies around 867 MHz in Europe. Yet you are subject to a maximum 5% duty cycle which is appropriate for stuff like temperature sensors but it makes it illegal to, say, stream audio. And of course there are transmission power regulations. Sound should read the relevant regulations. Even in the best effort ISM bands there are as a bare minimum power limits.
  3. just in case someone misunderstood what I meant with "idiot proof", in this case I was pointing at manufacturers of crappy equipment. I found this example. A friend had WiFi problems in his bar. Turns out he had both a crappy audio/video transmitter and a 2.4 GHz motion detector. The spectrum analyzer is a very simple one (an Oscium spectrum analyzer connected to an iPhone) but it worked.
  4. The problem with the 2.4 GHz band is that it can be wildly unpredictable. Apart from the usual WiFi signals there are other potential sources of interference. Except for standards based equipment, each manufacturer can take a completely different approach. So it is really difficult. On the 2.4 GHz band you can find sources of interference such as motion sensors for alarm systems or wireless video feeds taking a lot of bandwidth. I remember some household units that rendered half of the band unusable with a constant carrier. Remember that the 2.4 GHz band is
  5. The Internet community published an interesting development several years ago. https://datatracker.ietf.org/doc/html/rfc5984 That should help to overcome the delay due to retransmissions
  6. Me neither It depends on what you want. You can also try combining a shotgun with a figure-eight microphone (or two small cardioids back to back, perpendicular to the shotgun, and one of them phase inverted) in order to get some ambience. The key here is, you can decide how much ambient you want. The two small figure-eight capsules I know (AKG CK94, probably culled by Samsung with most of the AKG microphones) and an Ambient one are quite pricey. But the hack with two small cardioids can do the trick, Careful at least with the Ste
  7. Thank you, that explains it I guess bioacousticians don't care much about sound.
  8. I am really curious. Why? Reputable sources such as Cornell University recommend them because of their high sensitivity, relatively low self-noise and reasonable price. Some regard them as the workhorses of field recording. Of course if you are going to record a dialog it's a completely different world. I mean, when recording human speech we can perceive really minimum nuances that set different microphones a world apart. For other sound sources I don't think a beautiful sound matters that much. I would give an opportunity to Rode, especially their RF biased shotguns. I o
  9. That's the idea (I don't work for Viviana). In our case we set up a FreeNAS server with 10 or 20 TB of storage (I don't remember) and a clean 1 Gbps connection to our backbone. Had the need arised, we wouldn't have trouble to give it 10 Gbps. That was the trivial part. User management was a bit crazy, however. Also, I've seen a photo of a box with a USB connector on the soundonset.com website. So I guess the box emulates a thumb drive used to copy the files. Looks quite convenient if it works.
  10. Of course you can mail a SSD or a SD card or you can use an off the shelf cloud upload service. The tricky part is doing it in a more secure way. I am sure you have heard terror stories about databases with personal data left exposed on Amazon's S3 service for example. Offering a lot of storage room and bandwidth is not an issue, but a set of configurable access rights in order to accomodate a certain workflow can be very cumbersome to implement with common storage software, requiring a lot of manual work. Imagine for example a fine grained system in which
  11. Years ago I was able to clean quite a bit of clipping for a Fender Rhodes piano. Yes, it's a particularly easy target for that treatment. I used a multi band compressor for it, exactly WaveArts MultiDynamics. Also Izotope RX might help. https://www.izotope.com/en/products/rx.html
  12. What is the "garbage" problem, exactly? Distortion? Low signal to noise ratio? Maybe someone can give an idea.
  13. I would have them use an audio interface. Of course that means the remote actor/ess will have to use the audio interface and microphone. Software will really get in the way due to security measures.
  14. Be careful with high temperature soldering. I learned the hard way! I had to solder some female SMA connectors to PCBs and I decided to use lead free solder. I just had got a brand new temperature regulated soldering iron... And I badly botched it. The temperature damaged the connector dielectric material (and the circuits were supposed to work at 1 GHz) and the result was a complete disaster. Lesson learned.
  15. Now imagine that Schoeps clone company that even copies the ads. Will they copy the fart?
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