a CDJ or CD player sound mode

Hi Gontle,

I'm curious about the different sounds. I wasn't aware that there was a
difference. Do you know what some of the different techniques for mixing
are that lead to different characteristic sounds? We could try implementing
them if we knew them.

RJ

On Tue, Dec 20, 2011 at 9:20 AM, gontie <
<email address hidden>> wrote:

> New question #182467 on Mixxx:
> https://answers.launchpad.net/mixxx/+question/182467
>
> Most DJ softwares, Traktor, Mixvibes,Virtual DJ,DeckaDance and others are
> made to be used with a controller and also to connected to a mixer.
>
> But if you compare the sound of a CD player with all these DJ software,
> you will see that every software provides a different sound because they
> have each a specific summing.
>
> CD player do not have and need a summing because it only have as task to
> provide and manage one output.
>
> So if you have the summing of the DJ software + the summings of the
> External Mixer this makes to have a different sound than CD players.
>
> So the idea should be to have a sound type which reproduces a CDJ or CD
> player type.
>
> If you want, take time to compare a song into Mixxx, CD player, CDJ (if
> you have one), MP3 player and another DJ software.
>
> You will see that MP3 players and CD player and CDJ doesn't sound as any
> specific DJ software.
>
> I hope my request and explinations is clear.
>
>
>
> --
> You received this question notification because you are a member of
> Mixxx Development Team, which is an answer contact for Mixxx.
>

Hello RJ,

English is not my native language so will try to explain how you can discover this sound difference.

If you want to have an idea of the difference, please record a song with mixxx.

Then listen on different systems (homespeakers, Car, MP3 player) the original MP3 and the recorded file of this same MP3.

Do this for Traktor, Mixvibes and all other and you will always notice a difference between the recorded file and the MP3.

Now connect the output of a CD player to your soundcard and record it. You will notice that it sound very close to the original MP3 and not to any DJ software.

The fact is that all DJ software are made for external mixers and also for Midi controllers and internal mixing.

None of them make a sound difference for internal (Midi controller) and external mixing (Mixer) but CD players don't do internal mixing that is why the sound is more close to the original file.

I hope that you'll understand what i mean :)

Gontie.

> To: <email address hidden>
> From: <email address hidden>
> Subject: Re: [Question #182467]: a CDJ or CD player sound mode
> Date: Tue, 20 Dec 2011 17:25:45 +0000
>
> Your question #182467 on Mixxx changed:
> https://answers.launchpad.net/mixxx/+question/182467
>
> Status: Open => Answered
>
> RJ Ryan proposed the following answer:
> Hi Gontle,
>
> I'm curious about the different sounds. I wasn't aware that there was a
> difference. Do you know what some of the different techniques for mixing
> are that lead to different characteristic sounds? We could try implementing
> them if we knew them.
>
> RJ
>
> On Tue, Dec 20, 2011 at 9:20 AM, gontie <
> <email address hidden>> wrote:
>
> > New question #182467 on Mixxx:
> > https://answers.launchpad.net/mixxx/+question/182467
> >
> > Most DJ softwares, Traktor, Mixvibes,Virtual DJ,DeckaDance and others are
> > made to be used with a controller and also to connected to a mixer.
> >
> > But if you compare the sound of a CD player with all these DJ software,
> > you will see that every software provides a different sound because they
> > have each a specific summing.
> >
> > CD player do not have and need a summing because it only have as task to
> > provide and manage one output.
> >
> > So if you have the summing of the DJ software + the summings of the
> > External Mixer this makes to have a different sound than CD players.
> >
> > So the idea should be to have a sound type which reproduces a CDJ or CD
> > player type.
> >
> > If you want, take time to compare a song into Mixxx, CD player, CDJ (if
> > you have one), MP3 player and another DJ software.
> >
> > You will see that MP3 players and CD player and CDJ doesn't sound as any
> > specific DJ software.
> >
> > I hope my request and explinations is clear.
> >
> >
> >
> > --
> > You received this question notification because you are a member of
> > Mixxx Development Team, which is an answer contact for Mixxx.
> >
>
> --
> If this answers your question, please go to the following page to let us
> know that it is solved:
> https://answers.launchpad.net/mixxx/+question/182467/+confirm?answer_id=0
>
> If you still need help, you can reply to this email or go to the
> following page to enter your feedback:
> https://answers.launchpad.net/mixxx/+question/182467
>
> You received this question notification because you asked the question.

I think what you're asking for is a way to bypass the EQ processing and pass the audio directly to the soundcard. That feature is in the wishlist somewhere. There is also a bonus because it saves a lot of CPU time.

We would also have to check that at 44.1Khz, the linear scaler isn't altering the sound file at all. RJ, does our testing suite try scaling a sample to a value of 1.0? As in, does the scaler check to see if the file doesn't need any scaling at all? That would be useful for people who want to use Mixxx as a jukebox.

This question was expired because it remained in the 'Needs information' state without activity for the last 15 days.

Dear Owen,

I don't know if you made the test between any DJ software connected into a mixer and a CD player.

I think your description sound right but i cannot confirm it.

So I've linked one bug that applies, which ensures that if Mixxx is being used like a jukebox that it won't be messing with the audio -- if your audio card is 44.1, and your song is 44.1, it'll just copy the samples one to one. So that helps preserve audio quality.

I do also have a hack that can bypass the EQ processing so that output will be sent to external mixers raw. I don't know if we want that to be a real mixxx option though since the difference is negligible.

As for "emulating" the "sound" of a CDJ, that is impossible to do. All we can do is strive for better scaling engines and EQ processing.

That sound indeed what i wanted to ask.

perfect :)

OK So I'm closing this question with #6 as the answer