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borjam

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Everything posted by borjam

  1. USB-C is a complex beast. Normal USB-C is 5.0 volts. Period. Power delivery is a special specification implemented only on some devices (like Macs, some USB-C monitors, phones...) but it is not mandatory. Devices implement some kind of negotiation to enable PD. Other than that, USB-C is 5.0 V. I wouldn't dare to do an expensive experiment and I would ask Sound Devices. But it is safe to assume that MixPres don's support PD and in that case the expected voltage on the USB-C port is 5 V. I am not sure if some form of over voltage protection or regulation is mandatory on USB-C ports but I wouldn't assume it beforehand. This is a question you should ask Sound Devices. Your best bet is to use the battery terminals, connecting a regulator to them. There is even a Hirose adapter designed to fit like the battery caddy and it includes a voltage regulator. I wouldn't worry much about power noise. I am pretty sure Sound Devices filters the USB-C power input thoroughly.
  2. TL;DR: Don't without a voltage regulator. USB-C is a USB port, I imagine they haven't added a voltage regulator because USB is just 5 V. USB-C can go higher but some negotiation between is involved. As a desperate measure play with the battery terminals, which can get 7.5V (NP-F battery packs). Again, regulate.
  3. I know it's an old topic, but some time ago I found a supplier in France that seems to have nice and cheap antennas. They have a cheap Yagi and several log periodics among lots of stuff for wireless experimenters. https://www.passion-radio.com/wifi/50
  4. Old topic but I also have my own answer As I have understood it LUTs are generally used for non linear color encoding schemes used in contemporary digital imaging sensors. An old example of an "audio LUT" could be the µ-Law or m-Law curve used for telephone voice encoding. Nowadays anyway I guess all the equipment we have uses linear coding. In the analog domain the rough equivalent could be a noise reduction companding system such as the Dolby family but with multi band dynamics processing it's no longer something you can specify with a straoghtforward calculation or, as its name says, a look up tablle. So, not really valid.
  5. Pity. Is your controller up to date? Anyway these switches can be managed in the old fashioned way, although it can be quite annoying for someone without experience on Cisco network equipment.
  6. John Eargle's book was updated in 2011. https://www.routledge.com/Eargles-The-Microphone-Book-From-Mono-to-Stereo-to-Surround---A-Guide/Rayburn/p/book/9780240820750
  7. Yes, I agree. If your network is dedicated to Dante you don't need to mess with priorities. Multicast flooding might be a problem if you have a lot of traffic and some 100 MBps devices that can't cope with all the multicast. Yes, I checked that one because it's the only UniFi switch I have around. Mostly I wanted to check whether it had the infamous EEE (Energy Efficient Ethernet) which it does not.
  8. Finally I had a chance to check it. I have updated an UniFi switch to version 6.0.3.13535. According to somewhat sparse information on Ubiquiti's forum and checking out the configuration from the command line it doesn't support EEE. So that's a good thing. The potentially troublesome feature would be IGMP snooping as well. You really want it because it prevents multicast traffic from flooding all the switch ports, but Ubiquiti has been known to be sloppy with its implementation. By default it is disabled: (UBNT) #show igmpsnooping Admin Mode..................................... Disable Multicast Control Frame Count.................. 0 IGMP header validation......................... Disabled Interfaces Enabled for IGMP Snooping........... None VLANs enabled for IGMP snooping................ None Anyway these switches can be a bit messy to set up without a controller. First you need to ssh to it using the "ubnt" user name and password, after finding out which IP address it got from your DHCP server. After doing that you need to do a "telnet 127.0.0.1" from the switch command line in order to enter the Cisco style configuration mode. US-48-G1-US.6.0.3# telnet 127.0.0.1 Entering character mode Escape character is '^]'. Warning! The changes may break controller settings and only be effective until reboot. (UBNT) >enable (UBNT) #show startup-config network protocol none vlan database exit configure line console exit line telnet exit Maybe the best you can do is to use it in default mode and be happy if it works. I will try and setup a Dante network later using the IGMP configuration and I will post it anyway in case anyone is interested.
  9. Oh no problem then! As I said, I have spent like €500 on Ubiquiti wireless hardware and I am very happy. I recommend it to friends and I basicly forget that they exist except when I feel like tinkering. So, it's a good thing. I cautioned about Dante because the topic is "Small switch for a small Dante network". But I would only be careful about Dante specifically. Anyway give me an hour and I will check whether it is possible to disable Energy Efficient Ethernet using the mobile app, at least for a USW-48 (48 port).
  10. However, I would be careful with Ubiquiti for this application. Don't get me wrong, I use Ubiquiti wireless gear at home and I am happy. I also track beta/prerelease firmware versions. BUT (and it's a big BUT) they tend to disregard features that they don't perceive as important, and it usually means those features will be unstable. It took some time for them to fix a simple bad multicast implementation (they equalled IGMP to all multicast, which is wrong, breaking an IPv6 address assignment). What worries me in this case is energy efficient Ethernet (EEE), which is a know no-no for Dante. I am not sure you can disable it. Second problem with Ubiquiti, they used to have two different Ethernet switching families: UniFi and EdgeSwitch with the former designed for "enterprise" networks and relying heavily on a controller you need to install somewhere, although you can use a mobile app to manage them, and the latter being more "classical" with no proprietary centralized management and configurable via a command line (similar to Juniper Networks equipment) or a web interface. Sadly the EdgeSwitch line seems to be discontinued. I am not sure whether they have sacrificed it temporarily due to component shortages or it is a permanent decision. I have a 48 port UniFi switch I haven't used for some time, I will plug it this evening and report back what I see. That said, I wouldn't trust them much for this particular application. And, trust me, I don't have anything against Ubiquiti. The 48 port switch was a gift from them in order to test beta versions, so I have reasons to be even grateful. Talking to them in case of bugs is also easy thanks to the forum and the bang for the buck is incredible. BUT they tend to be a bit chaotic with software development and (I know I am repeating myself) little used features are sometimes overlooked.
  11. Some time ago they warned about component shortages and they even stopped selling low end models (MixPre 3 and 833) for now. There are also serious shipping issues. I guess that's it. The NY Times has had a pretty good coverage.
  12. Even if the network is dedicated to Dante (it can get tricky if you have other high demand or bursty applications running) I would never consider an unmanaged switch. The price of a reasonable managed switch from a reputable vendor is peanuts compared to the equipment usually discussed in this forum. And you can't imagine the amount of pain that crappy networking gear is capable of inflicting. And indeed multicast Dante can be taxing for poor switches. And it can become a nightmare in case you plug a wireless access point to your network. If only thanks to the capability to show interface statistics (errors, etc) managed switches are, in my opinion, mandatory. (Note that I am writing this with my ISP guy hat on)
  13. It arrived on Friday. I had ordered a 16 inch model with 512 GB of storage and the 24 GPU core M1 Max, 32 GB of memory. The thing is insanely fast. I was installing software, including XCode, and it was still at body temperature given that I had it on my lap while I sat on the couch. I didn't even bother to plug it to do that. Funny enough, my odl 2009 Macbook Pro was sitting idle on the table and I looked at them with a small thermal camera. While the 16 inch was busy working, the 2009 MBPro showed hot areas (top left corner of the keyboard and power connector) while, as I said, the new 16 inch didn't sweat at all. Bringing back MagSafe is a very welcome change. Unlike previous models, the power supply does not have an unremovable cable. It is actually a high power USB-C to MagSafe cable so in case of need you can plug it to a different USB-C supply. Although only with a high power one you will achieve the promised 50 % charge in 30 minutes. The keyboard has an excellent feel reminding me of the old Powerbook G4 I got back in 2003 which was really impressive. This can be a game changer even for real time audio processing as using shared memory between the CPU and the GPU eliminates most of the latency. We'll see though.
  14. So I operated my old Mac Pro. It was easy although I really hate those tiny u.FL RF connectors. It looks like you are going to destroy them but they are surprisingly sturdy for their size. Bluetooth has improved (as has WiFi being now 802.11ac compliant) but it still struggles trying to use the Airpods Pro in duplex mode (microphone and hearphones) so it may be a deeper issue in Mac OS X (the Mac Pro is running Mojave).
  15. Aha, but it's an audio interface offering Bluetooth 5.0 compatibility instead of a full fledged Bluetooth controller, right? I have bit the bullet and ordered a Wifi+Bluetooth upgrade for my Mac Pro. https://www.ebay.es/itm/164830614939 I haven't received it yet but I know the seller, I purchased an AMD RX580 card for the Mac Pro from him several years ago and it works like a charm. I will report back Thank you!
  16. I am using a MixPre-3 as an audio interface for an iPad during concerts. Nothing fancy, I run SMAART Tools on the iPad and I needed an interface to connect a microphone. As I already have a MixPre 3, problem solved.
  17. The Spanish listing is this one I think. Both recorder and control surface. Maybe you can persuade him/her to sell just the control surface. https://www.ebay.es/itm/124981503007?hash=item1d197a641f:g:IwcAAOSwFwBhfpHk#viTabs_0 The seller mistyped the reference writing RC-P82 instead of RC-F82 but according to the photos it's the RC-F82.
  18. Some detail would be great. I purchased AirPods Pro last month and I am very happy with them. Except that they struggle to work with my 2010 Mac Pro running Mojave (10.14) but I think the only reason is the old Bluetooth version it runs. With the iPod and iPad they work really well.
  19. Behringer cracked the Stradivarius secret and now they are flooding the market with $100 Behringarius violins. Imagine how many briliant violinists you can find now! (I wasted a good April Fools Day joke!)
  20. I will try with my Sennheiser HD600 when it arrives (November) People tend to focus on processor GHz but the two elephants in the room regarding computer performance are disk bandwidth (a non issue unless you do databases or heavy UHD video editing) and memory bandwidth. Memory bandwidth determines the speed at which the processor can move data between memory and its internal registers. It is critical because memory is much much much slower than the internal registers, and that problem is mitigated using caches (faster intermediate memory). Sadly Murphy's Law applies of course and there are workloads that can represent worst cases for cache management algorithms. So sometimes ultra fast processors don't provide the performance you would expect. The big advantage of the current approach adopted by Apple (memory inside the SoC) is, you can make it much much much faster. The downside is, no memory expansion possibilities (you would need to replace the whole SoC). There is no free beer. Furthermore, GPUs are increasingly used to speed up parallel operations like video encoding and some signal processing tasks. Again, no matter how fast your CPU and GPU are if you must spend a lot of time (and energy!) moving data from slow memory to graphics memory. By sharing it and being inside the SoC the system can use zero copy strategies to exchange data between CPU and GPU. That can give a massive improvement. So, the minimum 32 GB in the Max processors makes sense. Part of it will be used by the GPU in heavy tasks.
  21. Well, things are getting interesting! I enjoyed reading Jason Snell's post "Exile from Dongletown". MagSafe is back, more ports, improved keyboard after all their problems... And an insane processor with more dramatic peformance increases than most people realize. The memory bandwidth of the Max version is incredible.
  22. The shot taken last week shows my trusty MixWizard3 14:4:2 in action And, by the way, I suffered a hard to debug quirk with it! An ailing Macbook Pro power supply was making an audio interface restart. The interface was connected to the mixer's direct outs in order to record, and the continuous restarting induced some interference through the direct outs which are not fully buffered ("impedance balanced"). It was crazy until I found out with the audience already sitting down! Other than that I really like it and I think it is much better than the Mackie we have been using so far. I don't see A&H, SSL or DiGiCO adding toasters to their line up so I imagine it will be fine!
  23. They offered headphones when they were owned by D&M Holdings, which is consistent with the recent sprouting of OEM stuff under the Marantz name. But I think A&H are pretty well focused now. Hey, this picture might have been prophetic!
  24. It has improved a lot these last days. Now the Cloudflare checking is working as it should, verifying that I am running a real browser and redirecting to the forum in short order.
  25. Yes, same problem from Spain. I have tried several providers just in case it was provider dependent. It seems to affect especially Apple's Safari, I have just reached the forum using Firefox while Safari was stuck. @Jeff Wexlerif you need help let me know. I would guess you tightened the denial of service protection settings too much, which, by the way, are mostly unrelated to "hacking".
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