Topic: [COMP] Edirol R-4 Oade Warm v. Transparent MODs

[Brian Skalinder]

Files available for FTP download via web browser:

- 24/48 Warm

• ftp://ftp4all:ftp4all@tapers.org/drive1/_gear_comparisons/R4_Oade_MOD_comp/R4_Oade_MOD_comp_warm_24-48.flac

- 24/48 Transparent

• ftp://ftp4all:ftp4all@tapers.org/drive1/_gear_comparisons/R4_Oade_MOD_comp/R4_Oade_MOD_comp_trans_24-48.flac

- 16/44 Warm

• ftp://ftp4all:ftp4all@tapers.org/drive1/_gear_comparisons/R4_Oade_MOD_comp/R4_Oade_MOD_comp_warm_16-44.flac

- 16/44 Transparent

• ftp://ftp4all:ftp4all@tapers.org/drive1/_gear_comparisons/R4_Oade_MOD_comp/R4_Oade_MOD_comp_trans_16-44.flac

Or via FTP client:

ftp:  tapers.org
port:  21
login:  ftp4all
pass:  ftp4all
dir:  /drive1/_gear_comparisons/R4_Oade_MOD_comp/


Just for kicks, I ran a comp between the Oade R-4 Transparent and Warm MODs. Recording info about the samples:

Son Volt
2007-04-10
Chicago, IL - Vic Theatre

Taper        : Brian Skalinder / bskalinder@yahoo.com
Location     : Center, ~3' front of balcony, ~9' up
Mic Config   : ORTF (17cm, 110º)
Source       : Schoeps MK5 (cardioid) / KC5 / CMC6 > Oade Transparent MOD Edirol R-4
             : Schoeps MK5 (cardioid) / KC5 / CMC6 > Oade Warm MOD Edirol R-4
Record Format: 24-bit, 48 kHz
Conversion   : Edirol R-4 > USB > PC
Edit         : Samplitude SE v8.3 (16-bit samples only: resample / dither)
Final Format : 24-bit, 48 kHz / 16-bit, 44.1 kHz

I used a single pair of mics with XLR splitters running to ch1-2 and ch3-4 on the R-4, phantom on for all 4 channels.  Statistics for the WAVs reveal Average RMS values are pretty darn close across the Warm and Transparent files (especially considering the R-4's not terribly detailed level meters):

   - L channel:  0.31 dB
   - R channel:  0.27 dB

Full stats below for those interested.  Want 'em matched closer?  Do it yourself. 


WARM

                         Left     |      Right
Min Sample Value:   -13373.25     |  -12465.09
Max Sample Value:    14826.09     |   13372.17
Peak Amplitude:     -    6.89 dB  |  -    7.78 dB
Possibly Clipped:        0.00     |       0.00
DC Offset:               0.00     |       0.00
Minimum RMS Power:  -   56.22 dB  |  -   56.70 dB
Maximum RMS Power:  -   13.75 dB  |  -   14.23 dB
Average RMS Power:  -   22.96 dB  |  -   23.37 dB
Total RMS Power:    -   22.41 dB  |  -   22.80 dB
Actual Bit Depth:       24        |      24

Using RMS Window of 50 ms


TRANS

                         Left     |      Right
Min Sample Value:   -13815.05     |  -12823.73
Max Sample Value:    15335.07     |   13848.50
Peak Amplitude:     -    6.60 dB  |  -    7.48 dB
Possibly Clipped:        0.00     |       0.00
DC Offset:               0.00     |       0.00
Minimum RMS Power:  -   55.92 dB  |  -   56.44 dB
Maximum RMS Power:  -   13.44 dB  |  -   13.96 dB
Average RMS Power:  -   22.65 dB  |  -   23.10 dB
Total RMS Power:    -   22.10 dB  |  -   22.53 dB
Actual Bit Depth:       24        |      24

Using RMS Window of 50 ms

[dgodwin]

Thanks Brian!