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Author Topic: Tascam DR-70D 4-channel audio recorder (Part 8)  (Read 14859 times)

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Offline Moke

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #135 on: July 22, 2017, 12:51:19 PM »
Question for you all.
I'm considering using the DR-70 Line out instead of my usual DR-60 Line out to stream (audio only) at an upcoming two day festival (a mix of funk, jamgrass, americana etc.). With the DR-60 I was able to control the Line Out output gain, but with the DR-70 I have no such option, other than the -102/+12db Output Level settings with the Output Gain set to Line.

I'm reasonably confident I can make up for any gain with the Adobe FMLE software I use to stream.  Is there any other considerations I should have with regard to the output of the DR-70?

I'll be running 4 channels into the recorder, two soundboard, two mics.

Any thoughts appreciated.

This is sort of a bassackwards approach, but,... you can also use the headphone output jack as a variable gain output source. You won't be able to monitor with cans, but, you do have the option of variable gain output.
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Offline billydee

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #136 on: July 22, 2017, 04:03:07 PM »
Question for you all.
I'm considering using the DR-70 Line out instead of my usual DR-60 Line out to stream (audio only) at an upcoming two day festival (a mix of funk, jamgrass, americana etc.). With the DR-60 I was able to control the Line Out output gain, but with the DR-70 I have no such option, other than the -102/+12db Output Level settings with the Output Gain set to Line.

I'm reasonably confident I can make up for any gain with the Adobe FMLE software I use to stream.  Is there any other considerations I should have with regard to the output of the DR-70?

I'll be running 4 channels into the recorder, two soundboard, two mics.

Any thoughts appreciated.

This is sort of a bassackwards approach, but,... you can also use the headphone output jack as a variable gain output source. You won't be able to monitor with cans, but, you do have the option of variable gain output.
The DR-70 headphone output is kind of lame in my opinion, and I will want to have it available to listen.
I'm not sure what you mean about my approach, how would you suggest I feed the stream?

Offline Moke

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #137 on: July 22, 2017, 04:25:25 PM »
I was referring to my own suggestion of the h.phone amp as bassackwards, preemptively; nothing to do with yours.
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Offline billydee

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #138 on: July 22, 2017, 06:55:15 PM »
I was referring to my own suggestion of the h.phone amp as bassackwards, preemptively; nothing to do with yours.
Got it thanks!
I was re-reading my post thinking I had something backwards, which is always possible.

Offline Papaphunk

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #139 on: August 23, 2017, 04:49:42 PM »
If you are using anything except phantom powered microphones, make sure you turn off phantom before plugging anything into the xlr inputs.

Read this:  http://tascam.com/content/downloads/products/867/e_dr-70d_rm_vb.pdf

I just wanted to say how much I am enjoying working with this new recorder, we are starting to get along quite well.

Thanks for selling it to me, and answering some of my initial questions to get started.
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Offline Gordon

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #140 on: September 08, 2017, 10:02:45 AM »
question for folks that run a pre in front.  so I'm running line in on all channels, 1/2 from pre and 3/4 for sbd.  do you do low or mid gain?  I want to get all/most gain from the pre and have been using low.  With the gain on the Femto (pre) set the same I find I have to add more gain with the 70d than when I use the m10.  going to play around with it in front of the stereo but was wondering.
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Offline Gordon

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #141 on: September 08, 2017, 10:58:57 AM »
now I have to ask if low, mid etc even matter for line in?  I just tested both with the gain the exact same on the preamp (femto) with the same song at the same volume and max peak/levels were identical!
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Offline CorFit Chris

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #142 on: September 11, 2017, 11:35:48 AM »

Going to try my new unit picked uo in the yard sale this weekend. Eventually I would like to run CA-14 in the input for ch 1 and 2, which internal setting would I choose there ?

thx

Just to add, when recording outdoors I also use CA-14 omni's split apart as channels 1&2 (mini plug) with the 70D's plug in power, while supporting AKG 483's with Phantom48 to channels 3&4.  I find that there is little to no noticeable difference from using my battery box.  I am sure there are times this may not be the case, but I have recorded loud festivals and the CA's sound great on PIP.  For what its worth, you may not need to get a battery box for your CA-14 right away.
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Offline voltronic

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #143 on: September 12, 2017, 06:38:48 AM »
now I have to ask if low, mid etc even matter for line in?  I just tested both with the gain the exact same on the preamp (femto) with the same song at the same volume and max peak/levels were identical!

AFAIK, the gain range selection (low/mid/high/high+) only matters if input type is set to MIC, be that on the combo jacks or the miniplug input.
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Offline Gordon

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #144 on: September 12, 2017, 10:44:43 AM »
now I have to ask if low, mid etc even matter for line in?  I just tested both with the gain the exact same on the preamp (femto) with the same song at the same volume and max peak/levels were identical!

AFAIK, the gain range selection (low/mid/high/high+) only matters if input type is set to MIC, be that on the combo jacks or the miniplug input.

That sounds right given the results I had.  thanks!
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Offline heathen

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #145 on: September 13, 2017, 11:04:01 AM »
Not that it's necessarily an issue specific to the 70D, but I recently had a bit of a hiccup running one of these batteries to power my 70D:

Quote
Recommended External Batteries: (These batteries have been used by members with the 70D specifically.)

Generic "Power Bank" 20,000 mAh UltraThin - shown in use here.
http://www.ebay.com/itm/Ultrathin-20000mAh-Portable-External-Battery-Charger-Power-Bank-for-Cell-Phone/351755095213

Between an opener and the main act the battery showed 66% remaining (I think it started the show in the 70s, so the rest should have been way more than enough to finish out the show).  Only a couple of minutes into the main act the battery died, going straight to 0%.  I'm not sure if there is something wrong with that battery in particular, or if it's just a matter of subpar readout of the amount remaining, but I figured I'd give others a heads up to watch out for that.  Otherwise the battery is great...it takes quite a while to go from 100% to the 70% range!
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Offline dogmusic

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #146 on: September 13, 2017, 01:51:49 PM »
I'm not sure if this has been asked before, but for those who use the DR70D to make 4 channel recordings, what is your method for playing back those four tracks from four separate speakers? I have an A/V receiver with separate analog inputs. But the deck only has stereo out.


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Offline voltronic

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #147 on: September 13, 2017, 07:50:29 PM »
Not that it's necessarily an issue specific to the 70D, but I recently had a bit of a hiccup running one of these batteries to power my 70D:

Quote
Recommended External Batteries: (These batteries have been used by members with the 70D specifically.)

Generic "Power Bank" 20,000 mAh UltraThin - shown in use here.
http://www.ebay.com/itm/Ultrathin-20000mAh-Portable-External-Battery-Charger-Power-Bank-for-Cell-Phone/351755095213

Between an opener and the main act the battery showed 66% remaining (I think it started the show in the 70s, so the rest should have been way more than enough to finish out the show).  Only a couple of minutes into the main act the battery died, going straight to 0%.  I'm not sure if there is something wrong with that battery in particular, or if it's just a matter of subpar readout of the amount remaining, but I figured I'd give others a heads up to watch out for that.  Otherwise the battery is great...it takes quite a while to go from 100% to the 70% range!

Well, something to be aware of is that the first two of those "Power Bank" batteries I purchased have been excellent performers, but recently I bought I third and it was not the same.  Cosmetically / dimensionally identical, but much lighter weight.  It dies very quickly charging a phone, and is completely worthless.

The other thing to keep in mind is that the discharge curve for many batteries often takes a steep plunge downward after a certain point.  So given a constant draw, the time it takes you to go from 100% to 50% may be much longer than 50% to 0.
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Offline voltronic

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #148 on: September 13, 2017, 07:58:02 PM »
I'm not sure if this has been asked before, but for those who use the DR70D to make 4 channel recordings, what is your method for playing back those four tracks from four separate speakers? I have an A/V receiver with separate analog inputs. But the deck only has stereo out.

You're describing something like Quadrophonic, which was a fad surround-ish technique that required 4 speakers surrounding the listener.  There are certain modern surround / ambiance recording techniques that may benefit from similar playback.

Correct me if I'm wrong, but you're not making recordings such as these; you're just using two stereo mic arrays for a concert, correct?  I do this sometimes, and you load them into your DAW and mix away but the end result is always a 2-channel stereo file.

The 70D only has the stereo out, and regardless of the number of tracks you have or the configuration of them, that output is being fed a 2-channel stereo mixdown of everything.  It's not possible to do what you're suggesting direct from the 70D, but I don't see why you'd want to.
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I am hitting my head against the walls, but the walls are giving way.    ///    If a composer could say what he had to say in words he would not bother trying to say it in music.
- Gustav Mahler

Offline dogmusic

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Re: Tascam DR-70D 4-channel audio recorder (Part 8)
« Reply #149 on: September 13, 2017, 10:44:30 PM »
I'm not sure if this has been asked before, but for those who use the DR70D to make 4 channel recordings, what is your method for playing back those four tracks from four separate speakers? I have an A/V receiver with separate analog inputs. But the deck only has stereo out.

You're describing something like Quadrophonic, which was a fad surround-ish technique that required 4 speakers surrounding the listener.  There are certain modern surround / ambiance recording techniques that may benefit from similar playback.

Correct me if I'm wrong, but you're not making recordings such as these; you're just using two stereo mic arrays for a concert, correct?  I do this sometimes, and you load them into your DAW and mix away but the end result is always a 2-channel stereo file.

The 70D only has the stereo out, and regardless of the number of tracks you have or the configuration of them, that output is being fed a 2-channel stereo mixdown of everything.  It's not possible to do what you're suggesting direct from the 70D, but I don't see why you'd want to.

Thanks for your reply. Yes, I'm trying some Quadrophonic recordings with 4 microphones that put a listener in the center of four surround speakers (which many people have in their home theaters). I have to load the 4-Track recordings into Audacity and burn it as a 4-channel Audio-DVD in order to review the recording on a multi-speaker setup.

But since writing my question, I remembered that you can play the DR70D recording back on a DR680 (which has six individual track outputs) if you modify the file or the folder that it's in -- I can't recall. I'll have to look it up.
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"That's metaphysically absurd, man! How can I know what you hear?" - Firesign Theatre

 

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