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visitors
since 09/05/1996
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The Emax II was originally released as a 1Mb mono
16 bit sampler. That was quickly changed to 2Mb and stereo. Most
early models were retrofitted to stereo, but there are still some
mono units out there. Though it's maximum sample rate is only 39kHz
it does have the ability to playback samples created at 44.1kHz.
The Emax II filters are not analog, they are digital. But, unlike
the Emax with it's fixed 512k of memory the Emax II could be expanded
from 1Mb-8Mb though to go beyond 2Mb required the addition of a
daughterboard. For more information on Memory Upgrades view the
Repair/Upgrade section. The Emax II also had (at the time) a more
robust SCSI implementation which meant it was compatible with more
peripherals such as Syquest removable media, MO drives, CD-Rom drives
and a variety of hard drives. It's maximum partition size is 540Mb.
Operating System
- Model: 2201 1 Mb KEYBOARD
- Model: 2202 1 Mb RACK
- Model: 2203 1 Mb KEYBOARD (W/HD)
- Model: 2204 1 Mb RACK (W/HD)
(The original models were concluded in June of 1991)
- Model: 2212 2 MB KEYBOARD
- Model: 2213 2 MB RACK
- Model: 2205 4/8 MB KEYBOARD (W/HD)
- Model: 2206 4/8 MB RACK (W/HD)
The details of when E-mu actually cut over from
4 to 8Mb RAM or from 40 Mb to 105/127Mb Hard Drives is not known.
The Basics
- 5 Octave velocity sensitive keyboard C to C or
3 space rack
- 14 Velocity curves
- Velocity can control VCA level, VCA attack, VCF
cutoff, VCF attack, and VCF Q.
- 3.5 inch floppy disk drive (uses double sided,
double density (DSDD) floppy disks)
- Internal and external SCSI connection (internal
HD power supply)
- 32 Character Backlit LCD
- RS-422 connection
- MIDI In connection
- MIDI Out/Thru connection
- Programmable Arpeggiator
- 16 track "scratchpad" sequencer
- Clock In (Clock In can accept 24, 48, or 96 ppq,
the pulses should be at least 1ms wide and 1 to 5 volts.
- Clock Out (Clock Out sends a 24 ppq which is 5
volts and about 6ms wide)
- 2 Programmable wheels for real-time control over
pitch, filter cutoff, AHDSR attack rate, level, LFO modulation index,
etc.
- 2 Footswitches
- 1 Footpedal
Audio Out and In
- Headphone
- Mono Mix
- Main Out (L and R stereo)
- Sub A (L and R stereo / Tip-output and Ring-effect
return)
- Sub B (L and R stereo / Tip-output and Ring-effect
return)
- Sub C (L and R stereo / Tip-output and Ring-effect
return)
- Sample In (stereo / Tip-Left and Ring -Right)
Sample Rates and Times
For stereo samples, divide time in half
Time (seconds)
| Sample Rates |
1Mb |
2Mb |
3Mb |
4Mb |
5Mb |
6Mb |
7Mb |
8Mb |
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| 20.000kHz |
26.1 |
52.5 |
78.6 |
104.9 |
131.1 |
157.3 |
183.5 |
209.7 |
| 22.050kHz |
23.7 |
47.6 |
71.3 |
95.1 |
118.9 |
142.7 |
166.4 |
190.2 |
| 27.778kHz* |
18.9 |
37.7 |
56.6 |
75.5 |
94.4 |
113.2 |
132.1 |
151 |
| 31.250kHz* |
16.8 |
33.5 |
50.3 |
67.1 |
83.9 |
100.7 |
117.4 |
134.2 |
| 39.0625kHz |
13.4 |
26.9 |
40.3 |
53.7 |
67.1 |
80.5 |
94 |
107.4 |
* Sample rates shown in bold have a maximum continuous
sampling time equal to that of the 39kHz rate. Emax II performs automatic
sample rate conversions on the sample, then frees up the additional
memory for subsequent sampling.
| Audio channels: |
32 (16 Stereo) |
| Max Output Level: |
+4 dB into 600 |
| Input Impedance: |
5 kHz |
| Output Impedance: |
Stereo 100k
Mono 2.5
Audio 600 |
| Data Encoding: |
Input 16-bit Linear
Output 18-bit Linear |
| Max Input Sampling Rate: |
39kHz |
| Signal To Noise: |
90 dB |
| Dynamic Range: |
Input >90 dB
Output >102 dB |
| THD+N: |
>.05% |
| Stereo Phase: |
Phase Coherent +/- 1 degree at 1 kHz |
| Power Requirements: |
45 Watts |
Voice Architecture
Each of the 16 Stereo voices has it's own set of the
following:
- Dynamic digital lowpass filter (VCF) with AHDSR
envelope generators
- Digital amplifier (VCA) with AHDSR envelope generators
- LFO with adjustable rate, delay, and speed variation
The Emax II CAN chorus its voices without
loss of polyphony.
Digital Processing
- Truncation
- Looping (Crossfade and Equal Power)
- Digital combine
- Sample reversal, as well as rate and pitch conversion
- Transform Multiplication tm
- Splicing
- Advanced Split and Layer
- Individual tuning and attenuation for each sample
Synthesis
Transform Multiplication:
Transform Multiplication is a digital effect which merges together
2 sounds in such a way that frequencies common to both sounds are
accentuated while uncommon frequencies are discarded. It works best
on harmonically rich sounds.
Spectrum Synthesis:
Emax II's Spectrum Synthesis allows you to specify up to 24 complex
waveforms, (called Spectrums) and to either step or fade through them
during the course of a sound. The 24 waveform locations are called
Time Slices, since they represent the waveform at that slice of the
sound. This method allows more complex and interesting sounds to be
created. In addition, each partial (sine wave) can have a 24 point
envelope that determines the pitch of that partial over the course
of the sound.
Each Emax II voice can consist of two synthesized
timbres, a synthesized timbre and a sampled sound, or two sampled
sounds. The resulting voice can then be processed using the Dynamic
Processing features and placed anywhere in the stereo field.
Portions of text taken from the Emax II Owners Manual
© 1989 E-mu Systems Inc.
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