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About borjam

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    Bilbaina Jazz Club

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  1. borjam


    The root cause is the sad state of the software industry. It’s 2018 and a “file system” perpetrated in the early 80’s for floppy disks with capacities measured in the KBs is the only common ground among the different operating systems. A new, proper FS should be designed for this kind of applications, but the audio equipment manufacturers cannot do it alone. For it to succeed the operating systems should support it as a tier-1 file system, not requiring additional downloads. Keep dreaming!
  2. borjam

    Sound Devices Mix Pre-3 and Mix Pre-6

    Who knows. Preroll is important for field recording applications such as nature, effects gathering, etc. And I think it's considered a given. My two previous recorders (Marantz PMD661mkii and Fostex FR-2LE) have it. Yes, I think there was some marketing oversight when they implemented polarity reversal on the MixPre 6 and 10. It's free to do with the SoC they are using if you implement it with the FPGA. But preroll can be a bit more tricky. Anyway I would dare to say that they are changing the focus from a purely marketing perspective "let's restrict this feature so that customers buy the next model" towards a "let's add this feature if the hardware can support it". That purely marketing decision is what I called "offensive" some time ago with no offense intended of course Although in the traditional Sound Devices universe the MixPres are a dime a dozen (not criticizing the prices of the traditional units at all, I know you are purchasing so much more than some iron and silicon) the MixPres have entered a market where prices are generally much lower. Of course, I imagine that Sound Devices will be able and willing to service a MixPre in 5 years. I wonder about other manufacturers competing in the same segment. Probably the rest will be churning new models almost yearly.
  3. borjam

    MIX and ISO Tracks levels

    A good companion to you excellent book is "Mastering Audio, the Art and the Science" by Bob Katz and not only for people working on post. Except for a murky explanation of clock jitter and Internet file transfer in the first edition, concepts such as dynamics processing, digital audio, gain staging, etc, are very well explained. And I liked the K-system for example.
  4. borjam

    Sound Devices Mix Pre-3 and Mix Pre-6

    I've just installed it I can confirm they have fixed a bug I reported (crazy channel gain in basic mode when unlinking channels 1 and 2 on the MixPre 3). There is also preroll (on the MixPre 3, 2 seconds at 96 KHz, 5 at 44.1 KHz) and, big thank you, they listened and added phase reverse to the MixPre 3 inputs. Some more changes, so far sounds great
  5. borjam

    MIX and ISO Tracks levels

    Of course, and my apologies for the poor explanation. In the 16 bit world every bit was sacred In the 24 bit world with dithering you can sacrifice several for headroom without bad consequences. You are right, as I said my post was written too quickly. Quantization noise is deceiving because it is not a “constant” noise signal, but it’s correlated to the recorded signal, the weaker the signal the worse. In my experience anyway (recording live jazz concerts mostly) I can leave a headroom of even 20 dB when recording drums. 20 dB related to the level when I ask the drummer to play loud during the sound check. Of course I know that during the actual concert it will be much louder.
  6. borjam

    New toys from Klark Teknik

    The 5 GHz band has some advantages however. It has much more usable bandwidth and obstacles attenuate it, so distant interference should be weaker than with 2.4 GHz. Also, there is some hope as regular WiFi users move up to 5 GHz due to increased bandwidth needs. For example, here in Spain fiber optic access with speeds in excess of 100 Mbps are commonplace now. Are you going to use a 2.4 GHz network which cannot give you more than 20 Mbps of real file transfer throughput and subject to neihgbor interference? Sooner or later household applications will have to move up especially in densely populated areas. The real solution would be the 60 GHz band but it would require an access point inside each room. Gosh I remember when my 2.4 GHz network was the only one in several Km around and the noise levels were really low.
  7. borjam

    Sound Devices Mix Pre-3 and Mix Pre-6

    The problem is, the knobs are not motorized. There would be a disagreement. Unless they did something like controlling preamp gain with one source and mix fader with the other one.
  8. borjam

    MIX and ISO Tracks levels

    It depends on the meter ballistics actually. A PPM will give you the maximum values, so it would be safe to align them almost with -0 dBFS. However you must take the dynamics into account. If the program level increases and you are not using limiters you will have an overload. Or, even with limiters, you might hit them too hard. With 24 bit recording systems there's no need to run everything so tight. With 16 bits its was undesirable to record at somewhat lower levels because soft signals were subject to quantization noise. Remember that the number of bits determines the resolution. At 24 bits it's safe to leave a big headroom, you will still have plenty of usable resolution. Leaving 8 bits of headroom at 24 bit will still give you full resolution 16 bit signals. Of course you can't enjoy that luxury recording at 16 bits, you would have only 8 bits which would really suck. As a rough guide you can check this table of S/N ratios for different bit depths. https://en.wikipedia.org/wiki/Audio_bit_depth
  9. borjam

    Audio Interface for Women

    Now, seriously. Is it me or women are much better represented in the sound department than in the camera dept? Just curious.
  10. borjam

    Black Friday Sales 2018.

    Sound Devices: 30% discount on the music plugin for the MixPres.
  11. borjam

    Audio Interface for Women

    It still doesn't mach the infamous "Della" campaign by Dell. Do you remember? https://www.theregister.co.uk/2009/05/12/dell_launches_della/
  12. borjam

    Recommendations for versatile PA speakers

    I have a couple of MAUI 28 at the club and I'm really happy with them. Amazing value for money. Compared to Mackie SRM-450 (we used them before, now they are useful as monitors) it's an entirely different league.
  13. borjam

    Deity Connect.

    Thank you My initial skepticism about using the 2.4 GHz band has been dilluted to almost homeopathic levels now. And what I said about causing problems, I see I am most likely wrong. Maybe an obessive network administrator continuously running speed tests might notice some competition for the spectrum, but now I doubt it!
  14. borjam

    Deity Connect.

    Not trying to smear anyone, sorry in case it sounds like that. But I can't avoid being very curious about the gory details. After all I am a radio geek as well and a reliable wireless microphone on the crowded 2.4 GHz band is a real achievement! Let me try to explain. Andrew Jones said: So, it seems that the Deity system can generate those hints to tell WiFi nodes "you can transmit" or "wait". There are several mechanisms in play there. WiFi networks try to avoid collisions like the old Ethernet and in order to avoid the hidden node problem (read the chapter on the Aloha protocol on "Computer Networks" by A.S. Tanenbaum) it uses a mechanism called RTS/CTS. Especially before sending long packets that might tie the radio spectrum for a long time, an exchange warns that it will happen. Also, modern WiFi versions can detect signals from older versions. All of this helps to prevent collisions. I can imagine situations in which it might cause some issues even if negligible. Not suggesting that it could cause a wireless apocalypse or anything like that. As far as I know neither the FCC nor the European authorities perform a protocol level verification of WiFI equipment, for instance. Moreover, being a license free band shared by multiple technologies I think they mostly verify pure radio parameters like transmission power levels, out of band spurious radiation, maybe spectral masks and duty cycles in order to help, not guarantee, coexistence with other technologies, etc.
  15. borjam

    Deity Connect.

    I don't think they will conduct a complete protocol verification. But there are people much more knowledgeable than myself in that regard here. As far as I know they check for spurious emissions, power levels and spectral masks. But, again, I am not anything remotely resembling an expert on device certification, much iess on how it is done in USA