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Author Topic: Roland R-05 line-in rec levels mapped to relative dBFS  (Read 427 times)

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Offline Brian Skalinder

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Roland R-05 line-in rec levels mapped to relative dBFS
« on: February 23, 2017, 01:50:30 AM »
I'm in the process of slimming down my recording gear and missed my window of opportunity to pick up a Sony PCM-M10.  So, I got a Roland R-05 instead.

The R-05 provides control of recording levels using an arbitrary 80 point scale.  I wanted to wrap my head around how the 80 point scale mapped to my recorded dBFS levels.  I used a simple 1 kHz sine wave, line in, set levels so 80 points on the scale resulted in -0.1 dBFS on the recording, knocked the rec level down to 0, and tested every 10 point step on the scale to wee how it compared to dBFS.  The table summarizes my findings:

Rec Level | dBFS | Delta v. Previous | Cumulative Gain
======================================================
0   |  -138.0  |    n/a  |   n/a
1*  |  - 31.3  |  106.7  |   0.0
10  |  - 26.9  |    4.4  |   4.4
20  |  - 22.2  |    4.7  |   9.1
30  |  - 17.5  |    4.7  |  13.8
40  |  - 13.0  |    4.5  |  18.3
50  |  -  9.0  |    4.0  |  22.6
60  |  -  5.4  |    3.6  |  25.9
70  |  -  2.6  |    2.8  |  28.7
80  |  -  0.1  |    2.5  |  31.2

* Turns out Rec Level of 0 = no signal, so I had to start with Rec Level = 1 in my testing.


Thought others might be interested, so...FWIW.

Edited to add Cumulative Gain to table.
« Last Edit: February 23, 2017, 02:03:11 AM by Brian Skalinder »
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Offline benwah

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Re: Roland R-05 line-in rec levels mapped to relative dBFS
« Reply #1 on: February 23, 2017, 01:56:21 AM »
Have you seen this?

I'm linking to a google cached version because I can't seem to pull it well from the original:

http://webcache.googleusercontent.com/search?q=cache:QJJqERja4gEJ:www.b4net.dk/%3Fpage_id%3D111+&cd=1&hl=en&ct=clnk&gl=us

I just ordered an R-05 today
R-05.
Want to buy:  DPA 4060 stereo kit  & Church Bat 2B battery box

Offline Brian Skalinder

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Re: Roland R-05 line-in rec levels mapped to relative dBFS
« Reply #2 on: February 23, 2017, 01:59:49 AM »
Thanks, bw -- I had seen it previously, and tried to check it out again tonight, but also had trouble loading the page.  Thank you for link to the cached version!  Was wondering about 'unity' gain, which appears to be 40 on the arbitrary rec level scale.
« Last Edit: February 23, 2017, 02:04:20 AM by Brian Skalinder »
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