WEISS DAC501 User Manual Download Page 5

Weiss Enginering Ltd.

DAC501-4ch/DAC502-4ch

2.2

The IR Remote Control

Most of the keys on the IR remote control are self-explanatory. Here
are some additional remarks:

IR remote control buttons:

power on/off

select XLR/RCA out

UPnP input

select JACK out

USB input

volume up

XLR input

volume down

RCA input

mute

polarity

TOS (optical) input

DSP Presets 1

2

3

...

• The two top/middle keys select the active

Output

. Long press (>

2s) of either keys toggles the active Output’s

Termination

.

• The

polarity

key changes the absolute polarity of the output sig-

nal. If this is engaged (i.e. signal is inverted), the level figure on
the LCD display turns yellow.

• The

mute

key when engaged mutes the output signal completely

and the level figure on the LCD turns red.

• The

DSP Presets

keys select one of the Presets stored in the

DSP. More information on the DSP Presets is given in the web
interface description below.

Figure 3: IR remote control

2.3

The Web Interface

As last but not least possibility to operate with your DAC50x-4ch we offer you the Web Interface. This Inter-
face provides you a lot of flexibility and freedom when using the DAC50x-4ch. For example you are free to
access the web interface via your tablet or your computer.
The web interface will be updated according to new or changed DSP algorithms, which we will supply over
time. In order to access this interface your DAC50x-4ch must to be connected to your local area network
where your web-browser is also connected to.
The following sections explain the functionality of the Web Interface.

2.3.1

Basic Introduction

The basic functions and sections of the web interface are marked in fig. 4:

a

: volume control, muting

b

: L/R balance

c

: input selection

d

: coarse output level and polarity tied to the output type

e

: DSP plugin selection

f

: Snapshot and Preset storage

g

: Firmware updating

User Manual and

3

White Papers

Summary of Contents for DAC501

Page 1: ...DAC501 4ch DAC502 4ch User Manual and White Papers Software Version 2 5 1r3001 Date February 15 2022...

Page 2: ...ossfeed Headphone 14 2 3 12 Snapshot Storage 16 2 3 13 Global Presets 17 2 3 14 Firmware Update Download 18 2 3 15 M S Control 18 3 Technical Specification 19 4 Signal Processing Algorithms 24 4 1 The...

Page 3: ...d headphone outputs are provided Weiss Engineering has a 30 year history in D A Converter design In that time span we have learned a thing or two about converter design The DAC50x 4ch is the essence o...

Page 4: ...u which allows to select one of the DSP algorithms to be changed Note the rotary knob allows to scroll through the menus The algorithms can be operated via the touch screen but we recommend to use the...

Page 5: ...e DSP Presets is given in the web interface description below Figure 3 IR remote control 2 3 The Web Interface As last but not least possibility to operate with your DAC50x 4ch we offer you the Web In...

Page 6: ...Weiss Enginering Ltd DAC501 4ch DAC502 4ch Figure 4 Web interface overview User Manual and 4 White Papers...

Page 7: ...r in the high frequency content of music So this plugin can be beneficial if your favourite recording contains some unpleasant harsh sounds But sharpness can also arise during mastering or as a result...

Page 8: ...elected To switch a plugin on off just tap on the enable bypass tab The selection is highlighted in red By moving the slider you can adjust the user parameter Saturation The Saturation parameter adjus...

Page 9: ...qualizer plugin A little example should give you an idea of the functionality and the manifold opportunities the EQ offers The 1st band is set to low shelving with a boost of 0 5dB at 147 Hz i e frequ...

Page 10: ...s Consider the following instructions on how to set up the Room EQ with a simple procedure without using any measurement In an alternative setup scenario we will use the room measurement software of t...

Page 11: ...ries you may visit this website and calculate the potential room mode frequencies by entering the dimensions of your listening room https amcoustics com tools amroc This can help with determining the...

Page 12: ...roduction without boomed bass Note you may have gotten used to the acoustics of your playback setup and then when correcting it with the Room EQ it may sound strange at first But keep it and listen to...

Page 13: ...31 132 105 42 32 130 106 41 33 128 107 41 34 126 108 40 35 124 109 40 36 122 110 39 37 120 111 38 38 118 112 38 39 117 113 37 40 115 114 37 41 113 115 36 42 111 116 36 43 109 117 35 44 108 118 34 45 1...

Page 14: ...Schwede In acoustics this loudness describes the subjective perception of sound pressure1 Schwedes EQ design then considers this subjective perception to create a more pleasant playback regarding the...

Page 15: ...rall the same loudness impression To adjust how strong this dynamic range reduction should affect the playback you can set the Dynamic Level If you want to have less dynamics left in the output choose...

Page 16: ...peakers and Distance Listener faders If the geometry is not very well suited for the XTC playback the background of the two fader sections turns yellow The XTC may still work but may be compromised No...

Page 17: ...Headphone plugin allows adjusting the Amount level between 0 and 100 in order to achieve your preferential setting A higher Amount results in stronger impact of the plugin s effect on the played back...

Page 18: ...s also part of its setting and will be stored in the snapshot Figure 14 Snapshots maintenance In order to recall a stored snapshot select it by name from the list and tap on Snapshot Load Store a plug...

Page 19: ...er DSP algorithms are bypassed The plugin sequence within the composer matrix reflects the actual sequence of the DSP processing Pre set snapshot dropdown lists of plugins which are currently not appl...

Page 20: ...onnect to our Server to see whether there is any new device firmware available The DAC50x 4ch has to be connected via Ethernet to your internet router If new firmware is available the pad allows to do...

Page 21: ...V or 200 240 V automatic voltage selection Fuse rating 500 mA slow blow Power consumption 25 VA max Power consumption in standby 2 2 VA max Size DAC501 4ch Depth 30 cm Width 18 8 cm Height 6 6 cm Heig...

Page 22: ...puts None Analog Outputs 2 XLR connectors hot on pin 2 short circuit proof output circuitry DC coupled low output impedance 2 RCA connectors short circuit proof output circuitry DC coupled low output...

Page 23: ...0 dB setting 8 1 Vrms 20 4 dBu 10 dB setting 2 55 Vrms 10 4 dBu 20 dB setting 0 81 Vrms 0 4 dBu 30 dB setting 0 255 Vrms 9 6 dBu As input a 0 dBFS sine wave signal was used These levels are achieved...

Page 24: ...z 0 Hz 20 kHz within 0 25 dB Fs 88 2 kHz 0 Hz 40 kHz within 1 dB Fs 176 4 kHz 0 Hz 20 kHz within 0 25 dB Fs 176 4 kHz 0 Hz 40 kHz within 1 dB Total Harmonic Distortion plus Noise THD N 116 dBr at 3 dB...

Page 25: ...evel 126 dBr 0 00005 at 70 dBFS input level Linearity At 0 dBFS to 120 dBFS input level less than 0 4 dB deviation from ideal Spurious Components including Harmonics At 0 dBFS input level maximum outp...

Page 26: ...ree independent bands Each of them can be set to a mode namely low cut high cut to get rid of disturbing low or high frequencies low shelf high shelf to boost or cut low or high frequencies or peaking...

Page 27: ...and low cut filter also called high pass filter is displayed Figure 21 Low pass and high pass filter scheme To finalize this section you find an example chart that visualizes examples of frequencies f...

Page 28: ...uency that frequency then can be suppressed to some extent with the room EQ See section 2 3 6 for instructions about how to find room modes with a slow sine wave sweep If a room mode is very pronounce...

Page 29: ...applicable on headphones The main impressions you will get with the XTC based playback are Large stereo stage much wider than the space between the speakers A feeling of depth i e a 3 D like presentat...

Page 30: ...itional resonance frequencies specific noise at various frequencies specific crosstalk between left and right channels specific effects caused by the RIAA emphasis specific amplitude modulation effect...

Page 31: ...e 24 bit long result The digital to analog converter which converts the samples after the level control may only be capable to handle 16 bit wide samples Thus what should we do with the excessive 8 bi...

Page 32: ...24 bit converters no question that a level control with a 24 bit word length easily rivals the best analog level controls By the way 24 bits means 16 777 216 quantization steps The last example below...

Page 33: ...ion should effect the audio signal To be able to use the plugin properly it is helpful to understand how the levels of the plugin effect the audio signal There are two main levels the Dynamic Level an...

Page 34: ...t of different recordings with a wide range of loudness levels choose a lower and if needed negative Dynamic Level The lower this level is the more the dynamic content is limited The value 0dB is our...

Page 35: ...ignal untouched This idea is based on the so called m s stereophony Which is a coding process that transforms the signals of the left and right into a different representation The mid signal is the su...

Page 36: ...can define the Amount of the chosen De Essing effect Independently a special normalization is performed to create a result that is individually matched with the current sound of the music This is need...

Page 37: ...of how the different modes sound For the parameter Amount a good starting point could be around 6dB Futhermore in the beginning it is more easy for getting to know the sound of the De Esser and findin...

Page 38: ...le of such a headphone frequency response measurement is plot ted in red In reality such measurements are far more complex This exemplary headphone only creates an amplification imbalance in two frequ...

Page 39: ...concert hall So Schwede s concept tries to overcome these non linearities of the human sense of hearing with a equalizer design which creates an optimized compensation curve based on the psychoacoust...

Page 40: ...Weiss Enginering Ltd DAC501 4ch DAC502 4ch 5 Contact Information Weiss Engineering Ltd Daniel Weiss www weiss ch weiss weiss ch User Manual and 38 White Papers...

Page 41: ...nts spectral treatment overview 25 23 Dummy head microphone 26 24 XTC scheme 27 25 Block diagramm of the Weiss Vinyl Emulator 28 26 Image processing original left quantized without dithering middle qu...

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