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Summary of Contents for elysia alpha compressor
- Page 2 GmbH. Other product and brand names contained in this document are used for identification purposes only.
- Page 3 To avoid damaging the unit please allow it to reach room temperature before switching on. CE Conformity elysia GmbH, Ringstraße 82, 41334 Nettetal, Germany, declares with sole respon- sibility that this product complies with the following norms and directives: •...
- Page 4 Dear friend of audio culture, First of all, we would like to thank you sincerely for choosing the alpha compressor as your new mastering tool. From now on, you not only have the maximum possible audio quality in dynamics processing at your disposal, but also a complete arsenal of flexible and effective tools which will shift the fruit of your work to a new level.
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Page 5: Table Of Contents
BASICS Controls ............. 6 Connectors . -
Page 6: Basics
BASICS Controls Both channels of the alpha compressor are absolutely identical regarding their electronic design. Therefore both sides of the front panel have exactly the same controls and switches. Continuative information on the specific functions can be found on the pages in brackets. Thresh Attack Release... - Page 7 EQ On: activates the Niveau Filter. In the signal path, this special EQ is placed after the com- pressor section, thus it will not influence this section’s behavior. (p. 17) EQ Freq: the center frequency of the Niveau Filter. Around this reference point, bass is boost- ed and treble is cut or vice versa.
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Page 8: Connectors
1.5 A Slo-Blo @ 220 - 240 VAC 3.0 A Slo-Blo @ 110 - 120 VAC elysia GmbH • D-41334 Nettetal • Germany Mains module This module combines the line cord connector, the on/off switch, the fuse holder with in- tegrated 230/115 VAC voltage selector and a line filter for providing the transformer with clean current. -
Page 9: Getting Started
Getting Started Never fear! With its many options and quite a lot of controllers the alpha compressor might look a little tricky at first sight. In practical experience, however, it is a clearly structured and easy to use tool. The control elements are divided into three layers, whereas the left and the right channel sides are completely identical. -
Page 10: Signal Flowchart
BASICS In the middle of the unit, right below the gain reduction meters, there are three buttons to set the distinct operating modes of the alpha compressor: M/S Mode Active Channel Link M/S Mode If this button is pressed, the alpha compressor will work in M/S mode in which the controls on the left side affect the middle channel and those on the right side belong to the side channel. -
Page 11: Link Mode
Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast EQ Gain EQ Freq SC Gain SC Freq EQ Gain EQ Freq SC Gain SC Freq Gain Soft Clip Gain Soft Clip Gain Reduction... -
Page 12: Stereo Compression
BASICS Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast EQ Gain EQ Freq SC Gain SC Freq EQ Gain EQ Freq SC Gain SC Freq Gain Soft Clip Gain Soft Clip... -
Page 13: Auto Fast
Auto Fast (Attack) The Auto Fast function causes an automatic shortening of the attack time on fast and loud signal peaks. This effect is easy to comprehend when compressing a preferably dynamic drum loop, for example. Please set the following values as a starting position: •... -
Page 14: Feed Forward
BASICS Feed Forward This function makes it possible to switch the junction of the sidechain alternatively behind (feed- back) or in front (feed forward) of the actual compressor section. This has an enormous effect on the character of the compressor. Again, our drum loop can be used for demonstration: While processing in feedback mode is smooth and even, switching into feed forward mode will result in a clearly more aggressive and harder kind of compression. -
Page 15: M/S Matrix
Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast EQ Gain EQ Freq SC Gain SC Freq EQ Gain EQ Freq SC Gain SC Freq Gain Soft Clip Gain Soft Clip Gain Reduction... -
Page 16: Sidechain Filter
BASICS Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast EQ Gain EQ Freq SC Gain SC Freq EQ Gain EQ Freq SC Gain SC Freq Gain Soft Clip Gain Soft Clip... -
Page 17: Audio Filter
Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast EQ Gain EQ Freq SC Gain SC Freq EQ Gain EQ Freq SC Gain SC Freq Gain Soft Clip Gain Soft Clip Gain Reduction... -
Page 18: Mix Controller
BASICS Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast EQ Gain EQ Freq SC Gain SC Freq EQ Gain EQ Freq SC Gain SC Freq Gain Soft Clip Gain Soft Clip... -
Page 19: Soft Clip Limiter
Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast EQ Gain EQ Freq SC Gain SC Freq EQ Gain EQ Freq SC Gain SC Freq Gain Soft Clip Gain Soft Clip Gain Reduction... -
Page 20: Scenarios
SCENARIOS Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip 0,01 0,01 Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast 140 170 -0,3 -0,3 280 340 140 170 -0,3 -0,3 280 340 EQ Gain EQ Freq SC Gain SC Freq EQ Gain... -
Page 21: M/S Unlinked
Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip 0,01 0,01 Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast 140 170 -0,3 -0,3 280 340 140 170 -0,3 -0,3 280 340 EQ Gain EQ Freq SC Gain SC Freq EQ Gain... -
Page 22: M/S Leveling
SCENARIOS Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip 0,01 0,01 Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast 140 170 -0,3 -0,3 280 340 140 170 -0,3 -0,3 280 340 EQ Gain EQ Freq SC Gain SC Freq EQ Gain... -
Page 23: Vocal Down
Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip 0,01 0,01 Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast 140 170 -0,3 -0,3 280 340 140 170 -0,3 -0,3 280 340 EQ Gain EQ Freq SC Gain SC Freq EQ Gain... -
Page 24: Parallel Compression
SCENARIOS Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip 0,01 0,01 Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast 140 170 -0,3 -0,3 280 340 140 170 -0,3 -0,3 280 340 EQ Gain EQ Freq SC Gain SC Freq EQ Gain... -
Page 25: Lofi Compression
Thresh Attack Release Ratio Thresh Attack Release Ratio Soft Clip 0,01 0,01 Feed Forward Auto Fast Auto Fast Feed Forward Auto Fast Auto Fast 140 170 -0,3 -0,3 280 340 140 170 -0,3 -0,3 280 340 EQ Gain EQ Freq SC Gain SC Freq EQ Gain... -
Page 26: Reference
REFERENCE Threshold Offset The analog audio level of the alpha compressor depends on the studio environment it is used in. In the ma- jority of cases it depends on the D/A converter used, because the output stages of the converter determine the analog level. -
Page 27: Attack
Attack Here a burst signal (a sine tone that is boosted by 12 dB for a period of 100 ms) is used to demon- strate the effectiveness of the attack controller. The different curves show how fast this level jump is reduced by 4 dB. -
Page 28: Release
REFERENCE Release This figure is based on a very fast attack time; the gain reduction is about -7 dB. The burst lasts for 25 ms and then follows the release phase with time parameters of different length. The linear char- acteristic of the release curve is very easy to see here. -
Page 29: Ratio Feedback
Ratio Feedback The alpha compressor works with a soft knee characteristic and increasing ratios at rising gain reduction values. The scale on the front panel is based on a measured gain reduction of 6 dB. Strictly speaking, the ratio values become noticeably higher on stronger reductions: If there is 17 dB of gain reduction the ratio value will shift from the printed 1:2.5 to actual 1:4.5 after all. -
Page 30: Eq Gain Low
REFERENCE EQ Gain Low For this measurement the center frequency was set to 1.8 kHz and the EQ gain controller was set to different positions between 0 and full left (-3 dB). The diagram shows the effectiveness of the fil- ter: The lower frequencies are boosted up to 3 dB, at the center frequency they cross zero, and the higher frequencies are cut up to 4.5 dB. -
Page 31: Eq Frequency
EQ Frequency This diagram shows a variation of center frequencies with the EQ gain controller turned fully clock- wise (HI). The x10 button shifts the complete frequency area by a factor of 10. With settings in the border areas of the covered frequencies it is also possible to realize ‘almost’ shelving filters, but in these cases the level has to be adapted with the gain controllers. -
Page 32: Sc Low Pass
REFERENCE SC Low Pass This diagram shows some settings of the sidechain frequency controller (SC Freq) in low pass mode (LP). If the filter is set at 100 Hz for example, full gain reduction will still occur at these 100 Hz and the high frequencies will have lesser influence the higher they get. -
Page 33: Mix
This measurement diagram shows a fade from the original to the compressed signal (direct and compressed buttons active). The gain controller was set at 8 dB, which is also the reason for de- creasing levels in the more clockwise areas of the controller range. In case that only the direct or alternatively only the compressed signal is switched in, the mix controller does not have any influ- ence on the level. -
Page 34: Appendix
APPENDIX Level Problems No Signal This problem might be caused by balanced wiring. If the signal almost completely drops when the alpha compressor is activated, it is probable that a pin of the XLR connector at the input is not con- nected. -
Page 35: Technical Data
Technical Data Frequency Response: <10 Hz – 200 kHz (-0.5 dB) THD+N @ +1 dBu, 0 Hz - kHz: Stereo Mode (Direct) 0.0039 % Stereo Mode (Compressed) 0.009 % M/S Mode (Direct) 0.014 % M/S Mode (Compressed) 0.034 % Noise Floor, 0 Hz - 0 kHz (A-weighted): Stereo Mode (Direct) -95.8 dBu... -
Page 36: Warranty
To confirm your warranty please register your elysia product shortly after purchase. The easiest and fastest way is to use the online form you will find in the service section of our website www.elysia.com. If you cannot or do not want to use this option, please contact us via the address you will find at the end of this warranty statement. - Page 38 „Let there be sound“ And there was sound. (AC/DC)
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