What DJing from a streaming service requires

Loading tracks from streaming services is always longer than loading tracks from the host local storage (computer or smartphone).

Bandwidth needed

The higher the audio resolution, the higher the bandwidth needed, and the higher the response time:

Audio resolutions
  • Beatport: 128 and 256 kbps AAC
  • Beatsource: 128 and 256 kbps AAC
  • Qobuz: 320 kbps AAC (standard),  1,411 kbps PCM (hifi), from 1,018 to 6,971 (Flac) or 9,216 (PCM) kbps in Hi-Res audio
  • SoundCloud: 128 and 256 kbps AAC
  • Tidal: 320 kbps AAC (standard), 1,411 kbps PCM (hifi), and high-res audio (from 1,018 to 6,971 Flac and higher in PCM) in Masters, with HiFi Plus subscription

Internet access

An ADSL or 4G internet access is needed to stream music in a computer or a smartphone.

An optical fiber or a 5G internet access is comfortable to stream music in a computer or a smartphone.

If your computer shares the internet bandwidth with bandwidth hungry devices as a TV Set Top boxes, then to avoid latency/audio drops caused by this other device grabbing most of the internet bandwidth, you may 
  • either not use the TV set top box while DJing,
  • or reduce the video resolution in the set top box menus during your DJi sessions, too keep some bandwidth for your computer. 

Computer settings

If you can do it, use an ethernet (wired) connection to your computer.

Wifi is workable, but its bandwidth and response time cannot match with the bandwidth and response time of an ethernet connection.

Wifi is CPU intensive, especially in Windows, so that a Windows computer whose wifi is not disabled cannot be considered as optimized for real time processing as Djing.

If you have a home internet network, check the bandwidth of the ethernet switch connected to internet box: a 100-Mbps ethernet switch would be a bottleneck, a-1000 Mbps bandwidth is OK. 

Computer latency

Except for tracks loading and analysis which are really slower from a music streaming services, other DJing operations should be as fast whether you mix local tracks or streamed tracks, so if you feel it seems slower when played tracks from a streaming service, you should make sure you have enough free memory on your computer in closing any background program.

If your Windows computer lacks memory, it may use a fraction of the hard disk as a virtual memory, but the memory swap to access this section of the hard disk data is slower than reading data in the actual RAM. 


Hercules STAFF3

Tags: Technical tips, streaming

Play on computer speakers while prelistening in DJ controller built-in audio

Most DJ software let you play the mix on computer speakers while using the DJ controller built-in audio, at least for the preview. 


In Serato:

go in Settings > Audio
check the field: use laptop speakers

In Djuced,
go in Settings > Audio
as Audio device, select the dj controller built in audio interface
as Output, check the outputs of the DJ controller for Master and Headphones
In “Send master to computer speakers”, select the computer audio device

In VirtualDJ
Go in Settings > Audio
In the Outputs thumbnails, check Speaker+Headphone
In Hardware thumbnails, select the DJController with built-in audio
In Outputs lists, you should see the Master and the Headphones of the controller
Click on + sign on bottom right of the Outputs list
Select the computer audio interface as Master output


Hercules STAFF3

Tags: Technical tips, software

Prevent Windows from switching off USB devices

Windows power saving mode saves power by switching of the USB bus power, which disturbs most USB audio / video devices.

So to get rid of this setting:
1) Press Win+X keys, to display the Windows Quick Access menu
2) Select Device Manager in the list
3) Click on "USB Serial Bus controllers" to display the list
4) Find the first line with hub (USB hub, USB Root Hub, Generic USB hub...)
5) Right-click on the line and select Properties

6) Click on "Power Management'" tab, and uncheck the field
"Allow this computer to turn off this device to save power"

7) Click on OK
8) Find the second line with hub in the name among the list of "USB Serial Bus controllers" 
9) Go back to step 5 and do the same operations
... and so on until you have removed this setting from all your USB ports. 

Hercules STAFF3

Tags: Technical tips

Audio quality issues with USB audio devices

USB audio quality is related to
  • computer settings,
  • computer power,
  • USB settings and USB connection,
  • audio drivers (Audio or WASAPI mode)
  • the speakers, amplifier or headphones use
so in case of audio quality with USB audio devices, the needed pieces of information are

1) A description of the computer environment
  • computer brand and model, and the type of computer (laptop or desktop)
  • USB audio device brand, model and audio drivers version
  • Windows or macOS version
  • USB connection (direct USB port or via a USB hub or via a USB-C converter, brand & model of the USB-C converter, type of USB port (USB 2, USB 3, USB-C))
  • speakers or headphones brand & model, which input on speakers if speakers have several inputs.    
2) A description of the audio issue
  • type of sound issue: noise, hiss, crakles, ....
  • is it constant hear even when playing silence or do you hear it only when playing sound
  • if you hear it in speakers, do you hear it also in headphones, and vice-versa?


Hercules STAFF3

Tags: Technical tips

Djuced 5: Play an external audio source on a deck

To play an external audio source in Djuced, you need to use audio  device with an audio input (mic or line or phono), as DJControl Inpulse 500 which has a line input (Aux).

1) Set Djuced display in 4-deck mode

2) Go in Djuced Settings > Audio

3) Enable the audio input on a deck, for example Deck 3

4) Click on OK to go back to Djuced main display

5) In Djuced main display, click on the deck figure number to select the deck contents

6) Djuced then plays the external source on the deck instead of a track


Hercules STAFF3

Tags: Djuced, DJ Software, Technical tips

Control 4 decks in Djuced with 2 DJ controllers

To control 4 decks with 2 2-deck controllers, you must 
- control virtual decks 1 and 2 with one controller we call primary controller
- control virtual decks 3 and 4 with another controller we call secondary controller.

Djuced 5 cannot support twice the same controller, you need 2 different models, for example DJControl Inpulse 200 and primary controller and DJControl Starlight as secondary controller.

The secondary controller needs a specific mapping to control decks 3 and 4: this mapping is included in Djuced 5.0.8 for P32 DJ and DJControl Compact, and new mappings downloadable from Hercules support website for DJControl Starlight, DJControl Inpulse 200, 300 and 500.

Use 2 controllers in Djuced,
1) If the secondary mapping is not included yet in Djuced, copy the xml mapping file 
- in Windows, in the folder C:\Users\YourName\DJUCED\midi
- in macOS in folder MacintoshHD > Users > YourName > Documents > DJUCED > midi
2) connect the 2 DJ controllers to computer,
3) run Djuced
4) In Djuced, go in Settings> Mapping
5) Select the controller you plan to set as secondary controller, and click on Next

6) Select the mapping for deck 3 4 in the mapping list, and click on OK

7) You come back to Djuced mixing interface, and you see a short pop up screen of the last mapping you have loaded.

8) To avoid any issue, I recommend to close Djuced, and restart it.

9) Then in Djuced, select a 4-deck interface, for example "4Decks Horizontal" for a large screen, "4Decks vertical" for a small screen.

And that's it, you control decks 1 and 2 with the primary controller and decks 3 and 4 with the secondary controller.


Hercules STAFF3

Tags: DJ Software, Technical tips

Clean sticky areas on DJ controllers

The rubber paint on plastic surfaces often become sticky after some years (how fast rubber paint turns into sticky layer depends on temperature and air wetness).

The easiest cleaner to remove this sticky paint is alcohol, which dissolves the paint and dries by itself.

If the area to clean has no labels or marks (as jog wheel's ring), there is no risk to delete any label with alcohol, so you can use a cloth:
- choose a soft non abrasive coth
- pour alcohol on the cloth
- rub the sticky area with the cloth.

If the area to clean has holes difficult to reach, then you may use a soft toothbrush
- make sure the toothbrush bristles are soft
- pour alcohol on the brisles
- gently rub the sticky area with the toothbrush.

Il the area to clean has also some labels, as the alcohol may delete the labels, you can use Q-tips:
- pour alcohol on the cotton of the Q-tip,
- gently rub the sticky areas with the Q-tip in making sure the Q-tip avoids the labels.

You may also use WD-40 or hydroalcoholic gel instead of alcohol.


Hercules STAFF3

Tags: Technical tips

Clean a fader on a DJ controller

Faders are the most fragile part of any DJ controller, so one must be very careful when cleaning them.
One must never rub the carbon track (called taper) on the ground of the fader, so one should never touch it.
If a fader has dust or rust particles, on should:
- take a blow off air duster with a thin straw
- put the straw in the fader without touching the ground
- blow off any particule
- then take a vacuum cleaner and try to grab all these dust or rust particles.

Hercules STAFF3

Tags: Technical tips

Vegas Mode / Light animations on Hercules DJ controllers

When pluging the DJ controller to a computer, the lights of the controller switch on and off to form a light show called Vegas Mode.
It shows which keys are backlit, it animates your booth in a party when you stop DJing,  and it can also be used in your Youtube videos.
Here are the controls to start the Vegas Mode at any moment:

Instant (and short) Vegas mode

  • DJControl Instinct           Deck A (Pitch Bend Minus + Pitch Bend Plus) + Deck B (Pitch Bend Minus + Pitch Bend Plus)
  • DJControl Air                   Deck A (Pitch Bend Minus + Pitch Bend Plus) + Deck B (Pitch Bend Minus + Pitch Bend Plus)
  • DJControl Air +                Deck A (Bank 1 + Bank 2) + Deck B (Bank 1 + Bank 2)
  • DJConsole Rmx2             Deck A (Pitch Bend Minus + Pitch Bend Plus) + Deck B (Pitch Bend Minus + Pitch Bend Plus)
= its plays instantly a Vegas Mode animation, and stops at the end of the animation

Non Stop Vegas Mode
  • DJControl Wave               Switch OFF the battery, press right deck SAMPLE button, connect the USB and keep the Sample button pressed down for a long time=>  Non stop Vegas Animation
  • Universal DJ                     Set Universal DJ on tablet mode, and plug the USB => Non stop Vegas animation
  • DJControl Jogvision          Press Left-deck Preview + Load A + Load B + Right-deck Preview => Instant Vegas animation, then 25 seconds off, then non stop Vegas Animation
  • P32 DJ                              Plug P32 DJ to the USB port of a computer or to  a USB power supply, the Vegas mode starts automatically (after 5 minutes if P32 DJ is connected to a computer, after 2 minutes if it is connected to a USB power adapter)
  • DJControl Instinct P8        Plug the USB port to a computer or a USB power supply, the Vegas mode starts after 3 minutes
  • DJControl Inpulse 200 Deck A (Loop In + Loup Out) + Deck B (Loop In + Loop Out)
  • DJControl Inpulse 300 Deck A (Loop In + Loup Out) + Deck B (Loop In + Loop Out)
  • DJControl Starlight Press simultaneously on Preview deck A + Shift + Preview deck B + Vinyl


Hercules STAFF3

Tags: Technical tips

BBC archive: 16,000 free sound effects for your personal use

BBC offers 16,016 sound effects for personal, education or research use on on
The sounds are in Wav format, and cover multiple areas as:
- human sounds (crowd, footsteps, shriek, applause, shouts, laughters...)
- animal sounds (farm cattle, lion, horse, rats, dogs, monkeys...)
- objects sounds (cars, planes, train, printers, phones, doors,
- weapon sounds (rifles, grenades, bombs,
- weather sounds (thunder, wind, rain, storm...)

You may recognize among the sounds effects you have already heard in movies and TV shows.
The effects are available under the terms of RemArc license.
You can play with these sounds for your leisure or education, but not for public or paid use.


Hercules STAFF3

Tags: Technical tips