Sound Devices is taking liberty by trying to make a digital number make sense by matching the 0 levels up. The mixer is letting you know how big a signal it is sending above 0 at that point. Setting your limiter to avoid overloading the input device can be a matter of taste and experimenting. Most people would not want to reach the clip level of a digital recorder with signals but would prefer the mixer to limit the signal before the recorder clips. If you are running tone at 0 on the mixer to at the recorder you want the headroom above to record without issue.
I have found it useful for connecting the SD to digital camcorders as well as portable digital audio recorders. The author uses the incorrect spelling "desiBel" instead of "deciBel", but otherwise I found it very useful. Also, download the most recent version of the SD manual from the SD website - it has some extra info in it that was not in my printed manual when I bought my several years ago.
For example, it showed how to create a full scale tone on the output, to match the 's clipping level to the camcorder or recorder's clipping level. This is discussed on page 21 of the downloaded manual. Normally the tone output by the SD is not at full scale, but is instead from the manual : "From the factory, the Tone Oscillator is set to output a 1 kHz tone at 0 dBu to the outputs when the outputs are set to Line level.
In the Setup Menu, the Tone frequency and Output level can be adjusted, and tone can be defeated altogether. For simplicity, if you set the ref. One could write a book on this.. Hi Tom, Following is an extract from a published article of some years back I'm the author May help on the path VU or PPM?
Dbu or DBFS? An array of standards and specifications with which the new entrant into broadcast audio confronts. Broadcasters have standardised on one or the other as a matter of history, and of good engineering practice as defined by specifying bodies. But how many professionals understand the difference and the consequences of operating level? How does it relate to digital consoles, DBFS scales, and to the programme content? Most recognise this as the 0dbu reference, that is, the resulting voltage across a ohm resistance in order for 1mW of power to be dissipated.
What goes in, was what was supposed to come out - but it's okay leaving me! Therefore, it can be seen that things start to hot up very quickly at the business end of the scale if levels and standards are ignored. Consequences too for the audio console as output headroom becomes all the more important.
This maximum output level applies to many of the European broadcasters. Therefore, employing good practice and the correct engineering standards whatever the operating levels will guarantee programme content is held within the dynamic constraints of the transmission path. One further element to be considered however is the ballistics, dynamics, and integration time of the signal measuring instrument itself.
One may seem to underdrive, while the other might seem to overdrive. Therefore an appreciation of exactly what each instrument measures and how it responds mechanically should be realised. The VU meter has a typical integration time of ms, simply, its ability to 'see' the signal and mechanically register its value takes about one-third of a second.
For this reason the VU meter is considered to be relatively slow. However, the instrument detects averages not peaks - the Volume Unit so to speak. However, this does not help a transmission path where the output may be a radio transmitter. Often, a limiter device is employed to brick-wall the peak signals to the transmitter location.
The PPM on the other hand has a very fast integration time, typically a rise time of about 5ms, and a decay time of 1. As the name Peak Programme Meter implies, it detects peaks of the programme content. For transmission paths and transmitters sensitive to peak clipping, and at worst transient shutdown, it provided accurate monitoring and safety. Measuring Average or Peak values has advantages and drawbacks, but providing good practice and recognised standards are employed consistently, and more important, understood, then all should be well.
This being the case, the audio engineer is able to concentrate on the content and not whether their output is melting someone's transmitter, video tape or audio tape. This being true, then they can confidently say: "It's okay leaving me! Thanks this stuff is starting to make as much sense as a mishmash of inconsistent systems can.
The green LEDs below 0dBu will indicate too low of a signal. The posted link above on setting up the was helpful in that I learned the difference between the which I do not own, just lust after and the MixPre which I just got and am setting up. This means the procedure of hotting up the 1kHz 0dBu signal until it reaches clipping around 20dBu is not going to work for me. Rather I think I'll try to calibrate with an attenuator cable instead of sound devices menu.
I have a SEScom db attenuating cable arriving tomorrow. I'll plug that from the 3. This should get me close; 10db lower from the jack plus 25db more lowering from cable should be about 35db lower total, which is close to the dBu standard for microphone signals such as feed my 60d camera.
The way to do this may be to use the fader knobs along with an external 1k tone from a CD or NTI minirator mr2. I will adjust the level of that external 1k signal with the MixPre fader until it just tickles the 0dBFS indicator on the camera. Then I will twist the limiter screwpots down until the camera meter shows the level dropping from 0 to about -3dBFS, in both channels. Does this sound like a good plan for calibrating my mixpre to my 60d camera? Claire, your article was very well written, but left me still confused about what voltages actually happen If that is our 0dBFS signal, does that mean that the mixer would actually send I suppose the answer is probably "it depends" with a big asterisk of some kind I suppose the answer is probably "it depends" with a big asterisk of some kind :- Remember the "0dBFS" is "zero db full-scale" the never-exceed level when the meter hits the right-hand peg and the digital signal becomes all ones You wouldn't deliver that high a voltage to the camera or else your signal would be hopelessly clipped flat-line.
Send the tone to your camera and set the camera's input level controls so the camera meter indicates dBFS the EBU standard makes the numbers easy to juggle in your head. This gives you 18 dB of 'headroom' not really valid with digital recording but the concept works and the MixPre's limiters will catch any signal peaks that are high enough to approach clipping. If you look at the camera meters while recording that speech you'll see it hovering around dBFS.
That's normal because a sine wave tone at an average level of reads on a peak meter but a speech envelope at an average level of on reads about on a peak reading meter. I'm setting it up right now. Harder than I thought to get db-level accuracy, as one LED on these meters can span a range of many dbs. Using a voltmeter I read 5. That registers as about dBFS on the camera meter.
I was hoping it would end up dBFS, so we're within the ballpark here. But as a temporary measure I replaced the SEScom cable with a radio shack variable inline headphone attenuator designed for headphones without a builtin level dial. I dialed that such that it hits the spot on the camera's meter that I think is dbFS exactly. Text, image, video Image and video reviews only Text, image, video. There was a problem filtering reviews right now. Please try again later.
From the United States. Verified Purchase. It's a great recorder, but one drawback for those of us recording live music sessions is, if you're on stage, it's about placement and limiting. Thankfully, this recorder can limit the input level and avoid peaking, which is nice for on stage recordings and rehearsals.
It has other add ons like effects for both playback and recording. It also has a line in for a microphone or mix you'd want to pipe in. It claims to offer phantom power, but I couldn't get my condensers to work with it-- maybe because I'm using an adapter from XLR? Am unsure if the "power on" mic option actually gives 48v. Thus rated down a star This unit can record in the same formats protools LE records in.
It can also save. WAV files instead of. MP3 files, for better quality audio. Of course, it has an aux out so you can monitor your mix in headphones if you get the chance and even has an onboard speaker system, but it isn't stellar. Frankly, as someone who saw these machines in their infancy, I was fairly impressed with it's ability to write.
WAV files, in decent quality ie 24, 48 and the micro SD card it came with could still handle more than a rehearsal's worth of audio. Unless you're prepared to tweak settings, this would be a great tool for any musician to record rehearsals or practice sessions.
It's fairly simple to use and records some decent audio. Showing 0 comments. There was a problem loading comments right now. The sound quality is beyond what I originally expected! I like this recorder a lot. I bought it for one purpose only. A radio station in our region came on the air a few years ago in a format that I really enjoyed.
I enjoyed it so much that I recorded about mini-discs of the station's broadcasts, 5 hours and 23 minutes each, because I knew, if a station was that good, it wouldn't last forever. And it didn't. I am really glad I have all of these broadcasts to listen to. Problem was, how to transfer them from mini-disc to a digital MP3 file, as the MD format is out of production. The mini-discs have to be re-recorded in real time, which takes a while. As other reviewers has commented, this recorder does have a real appetite for the batteries.
Two AA cells lasted for about 7 hours of this kind of duty, recording at kps. I ordered a batch of rechargeable AAs from Amazon to save a few bucks, and I can always use them for other things when this chore is completed. Quality of recordings is just fine. Controls very easy to operate.
The manual answers any question I had. And, it really helped to read the reviews posted by other buyers, which saved me quite a bit of time setting up for the first recording session you have to push the record button twice to start recording - don't forget that little nugget of information. I do not see where there is any input for an AC adapter, though the manual intimates that you can run the unit from a USB hookup with a computer. I'll try it. All in all, a pretty solid little piece of equipment for the price.
Highly recommend. One person found this helpful. I initially was using it as a backup audio recorder for weddings and sweet sixteens quinceaneras. Time consuming. To my surprise the tascam recorded better audio than the shotgun mic on the native sony video. Plus, I had a backup copy on the external memory card. But the tascam captures the surrounding audio, is much clear, high tones are excellent and it records as WAV uncompressed format.
Uncompressed audio. Two things to be aware, the mics on the tascam are very sensitive to noise. The other, on the left side there is a "hold button". If it slides up, the tascam will not turn on. Just be careful as i learned it the hard way. I use rechargeable mAh batteries. I personally think is better to have two audio backups. But a good video with poor or faulty audio will give you problems. The background noise is very low, almost non-existent, so I can record sounds and later - during processing the recording - I can crank up the volume, which helps if I make the mistake of recording at too low of a level.
I can also set the format to be used for recording to the SDHC card. The sample rate of 48kbs or External microphone "phantom" power if an external mic is used can be selected "on" or "off". They are nothing but trouble; tape jams, slow or varying speeds leaving you with a poor sounding recording; poor battery life.
When outdoor videographers went to solid-state video recorders, that gave me a hint! Try recording video in the arctic or Montana, North Dakota, etc. Products made by Olympus Audio have failed me in the past, so I was really ready for this solid-state portable recorder.
I bought this recorder because I was not satisfied with the sensitivity and audio quality of an old Sony product. The Sony also didn't have the ability to download files to the PC. I use this mostly for recording meetings.
The Tascam seems to be targeted more to musicians. Based on the specs, the stereo microphones and other 'pro' features, I figured this would handle recording meetings without issue. So far, the sensitivity and audio quality are ok, not great. The biggest issue I have with this product is how complicated it is to use.
There is a reference manual for this thing, and you pretty much need every page. Unfortunately, it's not included with the unit. You get a user manual that provides an overview, but more details would have been much appreciated. The screen is small with lots of tiny icons and an orange backlight.
Readability suffers. The menu structure is several levels deep and there are 11 front panel buttons. I would not call this an "intuitive UI. Too late for me I haven't had much opportunity to use this yet, but I love it already. With record volume on auto-level, it adjusts almost flawlessly to the ambient sound level and records with astonishing clarity. This little hand-held is superior to any tape deck I've ever used and you can take it anywhere.
My main intended use is for recording of outside sounds and on-location performance recording. Theoretically that's just a software issue and could be addressed in an update, internal storage permitting. Recommended without reservation.
A correction: that's not a standard cellphone USB cable. Not a fan of proprietary cables. Algernon7 Top Contributor: Photography. Bought this to replace a dead Zoom H1. Provides phantom power like the H1 did but the battery lasts even longer. Seriously I have no idea how long it runs on the batteries but after 6 hours of recording it's still at full power on the power meter Has ability to adjust input level or use automatic input level.
Has headphone jack.
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