DVX Audio Shootout

tigeba

Well-known member
I started a new thread to discuss the shootout, but this little test was based on a previous thread about improving the DVX100A audio by using external mixers and preamps.


Click HERE to listen to the dialog test. The clip contains three takes of the same short dialog recorded with various recording chains. I did not apply any EQ, effects, filters, etc to this clip. I only used a little gain to attempt to match levels between clips to make it easier to compare them. I have not identified the recording chains in the clip, to give folks a chance to listen and form an opinion about what sounds good and what does not. I will identify each clip later. Here are the recording chains in no particular order.

Chain “A”: Neumann KM84i running directly to the DVX100A mic preamp.

Chain “B”: Neumann KM84i running into a Neve 1272 mic preamp, and the line level output of the preamp connected to the DVX100A line in.

Chain “C”: Neumann KM84i running into a Neve 1272 mic preamp (same gain settings as Chain “B”) and the line level output of a Digidesign HD192 .

To keep the variables down, the Protools recording was also performed at 48/16. To give you an idea of the relative cost of the setups, the KM84i is about a $600 mic, and is probably fairly similar to a mid/high end dialogue mic. The Neve 1272 preamp runs aroun 800-1000$ a channel, and is universally considered to be excellent. It is probably not the first choice for field recording, as I would guess the pros normally shoot for something more “accurate”, where the Neve is considered “warm”, or “big”. It is a transformer based preamp, and many modern preamps are essentially clones of this fella. The HD192 interface costs as much as a DVX100A, and it is no good without a Protools system, so you are looking at >10K for that. I think you could replace the HD192 with a high quality DAT and get the same results.

Have fun listening, and please share your thoughts.
 
Ok, so to my ears:

The first one is best - nice full sound, (perhaps just a tad boomy on some systems, but over all I like it) and no noise. The second sounds a bit cleaner than the third, but it sounds a tad tinny to me. The third sounds more full, yet a bit noiser than the second.

Just my $0.02.

Matt
 
Thank you tiqueba for the great comparison. All three recordings sound very good and none of them really stick out like a sore thumb with hiss and hum. The results are a pretty amazing testament to the DVX audio subsystem--including the pre's.

The first two recordings sound extremely close to me. The second was a bit louder, but the quality seems pretty comparable (on second listen the 2nd seems a little dirtier). The third recording sounded the best to me, without some of the "graininess" and lacking the slightly harsh high-end of the first two recordings. Overall, I'd say the DVX comes pretty damn close to the 10K chain for dialogue use and the DVX pre doesn't have significantly more hum or hiss compared to the Neve pre into the line in. Just for reference, I was listening on a pair of Event TR6 nearfield monitors.
 
Barry, How do you know which is which???

The third sounds good for the audio, but it's louder which can account for some of that. But do you hear all the noise in the silence???

The second had quite a bit of noise as well, the only one that was clean was the first. I'm not sure we're listening to the same thing???
 
I have no idea which is which, BUT for dialogue use I find them all roughly comparable. THAT is why the DVX is a winner. I don't use my DVX to record classical music, but I guarantee that recording technique will have an order of magnitude greater difference on final DVX sound quality over use of a high-end pre.
 
Even for dialog I would not be very happy with two or three. I could live with them, but I would be spending a lot of time editing the waveform to clean up the audio and (for the second one at least) would do a fair bit of eqing.

I mean they're both really noisy??? Or don't you hear what I'm hearing??? I don't find them "roughly comparable" at all (maybe two and three, but still substantial differences exist). Each one is pretty distinct to me.
 
On further listen I'll give you the third over the second, because I don't like the tonal quality of the second one at all and would rather edit the noise that reshape the sound (I think, I'd have to play with it). But the still the first and second are in completely different leagues to my ears.
 
This is fun... and cool. Thanks!

The first one is best... easily. That's what I'm talking about when I said an easily audible difference. The first clip has it by a good margin... and so you know what is my guess as to the level of gear that recorded that. I'd gladly lay down an extra grand or two for that difference... but I don't have the cash to fund chain "C".

The second and third both sound like they could be DVX direct... and I hope that your DVX is at -50db on both channels. Each of the last two clips sounded hot to my ears.

My guess is that the second clip is "A" and the third is "B". I had a hard time deciding on the last two. I felt like I had to turn down the last clip a bit to balance it with the second, and that made the background hiss drop lower then the second clip's hiss level... but again, it sounded like the last two clips were both nearly clipping or over-gained.

If this is how it really breaks down then YES the DVX audio can be improved a lot... but NOT if you still use the DVX to record that audio.

I hear a cleaner signal in the very last clip versus the second... but it took me about 10 plays to make that judgement. If I didn't touch my levels then the second clip sounds cleaner then the third... but the voice then seems higher in the third... so equalizing them (to my ears) is how I judge the second clip to be the least clean... or "A".

Now why don't you make my day and say the first clip is the "A" clip? Just kidding...

I agree with MattC's first assessment, but I think the second and third clips are the opposite. The one thing that really struck me here is how much better that mic sounded on the good gear... This made me go back to a wav that I posted of the 416 and I think it sounds way better then either of the last two clips... but it still has that "tinny" character... like the mic iteself is emulating room acoustics rather then picking them up... that's something I never considered before.

This is exactly what I was asking for... and it makes me even more excited to get the SD piece. I wanted it anyway for wireless boom and monitoring... but anytime I'm not wireless I'll be sure to run it LINE rather then MIC... and I guess I'll be looking into some other improvements later...

BTW I make my sound judgements with a pretty good computer with an Audigy II Platinum card and my Sony 7506 headphones. I already KNOW that the Audigy isn't everybody's favorite card and I shoulda' got a DMX6-Fire, but in the spirit of full-disclosure I thought you should know...
 
Man, you guys posted a lot of sh*t while I was listening over and over... my first reply there was supposed to pop up RIGHT AFTER MattC's first reply!
 
Okay now that I read all the posts that happened while I was waiting to post my first reply... I do agree with MattC all the way around... I see that he changed his choice of 2nd clip being 2nd cleanest and moved 3rd to second place... as was my initial assessment. Also... I gotta' agree that there is no comparison between the first clip and the other two... I mean none. I find it almost hard to believe it's the same mic! (I don't REALLY find it hard to believe... but to me there is enough difference that I wouldn't be surprised.)
 
Ok, I've listened more carefully and I'd rank the first recording as the quietest, the second is a little noisier, and the third is the noisiest. But overall they also sound a little louder going from one to three. Number three might sound "smoother" because it's rolling off some of high-end that I find a bit objectionable. You find two and three unacceptable for dialogue? Interesting, because I could easily work with any of these chains.
 
And I'm still listening. I can't believe that Barry and I are listening to the same thing!

As you can see I revised my assessment to agree with taking the third, but I wouldn't really be able to tell which I would take until I brought them into my audio app and made them both usable (for me). You know, once you start bringing the second into line tonally, it might affect the noise a fair bit... I don't know, all I know is I only really like the first one. Since I don't have a DVX I won't throw out a guess as to which is which...
 
Whew, I feel better now.

:)

Well, I find the last two unacceptable in their current state, but as I said, I could certainly work with them. But that takes substantial time to hand eliminate noise at the waveform level (or best way). For a goofy short that I make in my bedroom? I don't mind spending the time. If I were doing something serious or god forbit a feature, it would actually be a waste of money to not use the signal chain that produced the first example. Of course if the first one is "A" then life just got really, really good.
 
I don't find 2 or 3 unacceptable... (I know that wasn't aimed at me)... but 1 is in a league of it's own. Honestly I had no idea that there would be THAT much difference.

It seriously doesn't sound like the same mic. There is such a fat, tonally warm sound to it... very intimate... it makes me wonder what's hiding in the mics I have packed away right now. If you listen to the 416 wave on my site it sounds somewhere between the 1st and 2nd clips... and I wonder just how amazing a 416 would be in the "C" chain?

If somebody posted something like this and the "C" chain was within my grasp, but meant I had to get a different camera... I'd have to do it. I absolutely love the sound of the first clip in comparison to the other two.
 
I will chime in tomorrow about what is what regarding the input chains. Have fun and good night from me :)
 
Ha, my monitors were set very low for my first listen, and I shot from the hip, but after turning the volume up and a few careful listenings I found myself agreeing with you more.
 
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