Numark Industries DM1285, DM1200, DM1235 Channel Mixing, Prepping For a Mix, Syncing To Off Beats

DM1200/DM1235/DM1285

In order to create the perfect mix, your goal is to keep both bar graphs as close to centered (Greenor Yellow) as possible.

First, align the top graph, the Tempo Difference Graph. This graph indicates how close the two BPMs are to each other. If they are exactly the same tempo, the GreenLED in the middle will light up. If one song is faster than the other, the bar graph will shift towards the faster song. If the Tempo Difference graph is not centered, adjust the speed of one of the inputs using the pitch control. For example, if the Tempo Difference graph has a Red LED illuminated closer to the right channel of the Beatkeeper, the right channel is faster than the left channel, either slow down the right channel, or speed up the left channel.

If the opposite is true, the Tempo Difference Graph has a Red LED illuminated on the left channel, indicating the song on the left channel is faster than the right channel, either slow down the left channel, or speed up the right channel.The second step involves the bottom graph, the Beat Offset Graph. This graph indicates how close the individual beats are. Both BPMs may be the same but the beats may not be in sync. This is often described as the “ping-pong” effect. If the beats are matched, the GreenLED in the middle lights up. If the beats of one input are earlier than beats of the other input, the Beat Offset Graph will shift toward the song with the earlier beats.

To align the Beat Offset Graph when using CD Players, adjust the appropriate pitch bend. If you are using turntables, hold or apply pressure to the record/turntable and then release to “shift” the beat.

If the Beat Offset graph is shifted toward the right channel, either use the minus (“-”) pitch bend for the right channel CD player (with vinyl, apply pressure to slow the turntable) or use the plus (“+”) pitch bend for the left channel CD player (with vinyl push the turntable ahead).

Intuitively, if either bar graph is shifted towards a channel, this indicates that the song on that channel is “ahead” of the other one. Either the tempo is faster (top graph), or the beats come sooner (bottom graph).

When both bar graphs are in the Green, you are ready to perform your mix!

Don’t forget you can always resync to the beat, if it ever shifts off, by tapping the Beat Assist button.

If the beats start to drift, you'll be able to easily adjust the music before your audience can hear it. No other beat counter or automatic mixer can give you the power to make a more accurate mix!

NOTE: The Beat Offset bar graph either indicates beat-to-beat offset, or beat-to-halfbeat offset, whichever is closer. This allows the DJ the option of mixing on the beat or on the half beat.

Channel Mixing

One exciting feature of your Beatkeeper built into your mixer is the option to visually beat mix more than 2 sources at the same time. Once you have synced a channel of the Beatkeeper, the unit will continue to track it even if you should decide to change channels. Up to all four channels can be in sync simultaneously. By selecting different channels, you can cross-compare the mix of any 2 channels instantly.

In order to perform a 3-way mix, you first will need to set up a 2-way mix as described in the previous section.

NOTE: Multiple source or “layer” mixes should be performed with a minimum of vocals otherwise the music will clash when mixed for a long period of time.

The next step will be to decide which input channel you would like to use as a reference for beat mixing.

While your 2-way mix is ongoing, change the channel, on the side you have not chosen as a reference to the next song you plan to mix into. Now sync and mix this song like you did for the 2- way mix. After you have synced up the new song you should continue to check your original mix by switching between channels. When you have properly aligned the new song, you are ready to perform a 3-way mix.

To perform a 4-way mix, just do the same thing again.

Prepping For A Mix

You may also choose to prep the Beatkeeper for an actual mix. To prep the Beatkeeper, first match the two song's tempos by adjusting the pitch so that the Tempo Difference LED graph displays Yellow or GreenLEDs. Next, hit the Cue button of your CD player, or lift your record needle. The Red “beat” LED will remain solid alerting you to which input is ready to start. When the music starts again, the Beatkeeper begins right on the beat and indicates how well the two songs are synced within seconds.

Syncing To Off Beats

Now if you really want to be fancy, you can actually use the Beatkeeper to sync to the off- beats. You can have two songs going “Boom - Cha - Boom - Cha”. Normally, you would sync the “Booms” of both songs (beat-to- beat mixing). But you can also sync the “Boom” of one song to the “Cha” of the other (beat-to-half beat mixing). The Beatkeeper’s Beat Offset graph will display whichever offset is smaller. This allows the DJ the flexibility to mix with the beat or the off-beat.

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