VO-BB - 20 YEARS OLD!

[Dave DeAndrea]

I recorded the same little bit of script over ISDN and then over ipDTL with Studio Bard to compare the two services. The first VO on this file is over ISDN and the second is over ipDTL.

https://soundcloud.com/davedeandrea/isdn-vs-ipdtl-comparison

The in-depth report can be found here:

www.studiobard.com/concrete/index.…h/ipdtl-report/
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Dave DeAndrea
Voice Actor & Producer
www.davedeandrea.com

[JTVG]

Thanks. That's a great test. Listening to all of the samples at the Studiobard site, ISDN definitely provides better bandwidth and a fuller sound, and that's disappointing. But hopefully as technology continues to get better, this will change.
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Joe Szymanski
http://www.joethevoiceguy.com

[georgethetech]

Source Connect's AAC still sounds better than Opus and MPEG L2 Mono 128, but at much higher latency. It is a trade off, for sure.
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If it sounds good, it is good.
George Whittam
GeorgeThe.Tech
424-226-8528
VOBS.TV Co-host
TheProAudioSuite.com Co-host
TriBooth.com Co-founder

[Lance Blair]

Thanks for doing this test. This is the best test yet, as you're sending the same take through both. It sounds like different reads on the other test. I actually liked the ipDTL on the other test even though it was 'thinner'. The ISDN sounds better on your test, but I think the ipDTL sounds great. It depends on the end use for the audio, I suppose.
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Skype: globalvoiceover
and now, http://lanceblairvo.com the blog is there now too!

[Ed Fisher]

[Dave DeAndrea]

[Lance Blair]

Hah! Well, you matched it extremely well! In the other test, the differences were noticeable. He points out a harshness in a word on the ipDTL read that sounded more like added nasal strain, not anything technical.

Dave DeAndrea - the guy is a machine!
_________________
Skype: globalvoiceover
and now, http://lanceblairvo.com the blog is there now too!

[Frank F]

Matching these ""takes" up on a scope reveals a lot. I is not IPdtl's fault, it is in the acceptance of Opus as it is packaged. I am tweaking what I have developed to more match the "original" input. It takes more work that I had hoped to get the sonic quality to where I believe it is acceptable.

Frank F
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Be thankful for the bad things in life. They opened your eyes to the good things you weren't paying attention to before. email: thevoice@usa.com

[JTVG]

I did a series of tests tonight to really put ipDTL through the ringer. The mic is a Sennheiser 416 into a MicPortPro, into a laptop. I was directly connected into a modem on both ends via eithernet. (Don't judge the read, please. It was quick and dirty)

Sample 1 - Near end record using the laptop.

Sample 2 - Far end record, captured at studio desk through the mixer.

Sample 3 - Far end record, with a slight 12k bump as it comes in through the mixer.

Sample 4 - Orignal near end sample, piped through the ISDN (line 1 calling line 2) and then recorded. This simulates what the same source material sounds like through ISDN.

Edited to add:
Sample 5 - Bridging through internet, through ISDN unit (loop back mode) then recorded. No EQ.

Sample 6 - Bridging through internet, through ISDN unit (line 1 to line 2) then recorded. Slight 12k EQ boost.

My observations:
I was considerably disappointed with the perceived lack of bandwidth on the ipDTL connection, even though I was running HQ 128 on both ends. It does seem to benefit from a slight EQ boost around 12k to give it a little brightness. Still, ISDN is noticeably better. I'm not sure why the samples seem so different than what is demonstrated on the StudioBard site. I actually emailed Kevin to see what he thought. Having never actually tried a mic with iPDTL before, these results aren't quite as good as I was anticipating.

Thoughts?
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Joe Szymanski
http://www.joethevoiceguy.com