Channel Mixer What's the difference between a 2 channel and 4 channel Mixer?
Can you explain the difference between the two? Also, I'm trying to become a beginner House/Trance/Techno Dj, would you reccommend a 2 channel mixer? Thanks so much!
2 Channels is the difference.
Most mixers are Stereo out, but they can have many channels in. Typically 8,16,24,48 on up.
The input channels are for of course input signals.
The more you have the more signals you can mix to the output.
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The Luminance blend mode seems incorrect, at least if Photoshop CS4 is any sort of reference.
Photoshop's Luminance is calculated as:
Luminance = 0.30R + 0.59G + 0.11B
You can verify this by placing any image in Luminance blend mode over any grayscale image. Compare the result to taking the original image and using the Channel Mixer (monochrome output) with settings 30, 59 and 11.
HSL Lightness (L) is calculated as:
L = (max(R, G, B) – min(R, G, B)) / 2
This is from your own algorithms. The two formulas are clearly not the same.
Using U for Luminance, I don't know what the RGB2HSU formula is (although I could guess) nor what the HSU2RGB formula is. I would love to find out.
This is the first of two portraits of Harmony, both of which were shot today. This one was taken in our garden this morning, while the second was taken in the park in Veliko Tarnovo at lunchtime. Of the two, I think I prefer this one, but there’s something about the next one that I really like too. In terms of the post-processing: this is a partial black and white, insofar as I used a Channel Mixer adjustment layer (biased towards the red channel) to convert the image to black and white, after which I lowered the opacity of the layer to allow some of the colour to bleed back into the image. In other words, it’s very much like the first image I discuss in my Black and White: part one tutorial; i.e. the image is a lot lighter than the original – because of the way in which the black and white conversion was carried out – but because the opacity of that layer was lowered it’s a colour rather than black and white image. To give you an idea of what I mean, take a look at the original:…
![Apple Logic Express 7 [OLDER VERSION]](http://www.stagelightingandeffects.info/media/images/i/219KTN2JQ3L._SL75_.jpg)
The Luminance blend mode seems incorrect, at least if Photoshop CS4 is any sort of reference.
Photoshop's Luminance is calculated as:
Luminance = 0.30R + 0.59G + 0.11B
You can verify this by placing any image in Luminance blend mode over any grayscale image. Compare the result to taking the original image and using the Channel Mixer (monochrome output) with settings 30, 59 and 11.
HSL Lightness (L) is calculated as:
L = (max(R, G, B) – min(R, G, B)) / 2
This is from your own algorithms. The two formulas are clearly not the same.
Using U for Luminance, I don't know what the RGB2HSU formula is (although I could guess) nor what the HSU2RGB formula is. I would love to find out.
This is the first of two portraits of Harmony, both of which were shot today. This one was taken in our garden this morning, while the second was taken in the park in Veliko Tarnovo at lunchtime. Of the two, I think I prefer this one, but there’s something about the next one that I really like too. In terms of the post-processing: this is a partial black and white, insofar as I used a Channel Mixer adjustment layer (biased towards the red channel) to convert the image to black and white, after which I lowered the opacity of the layer to allow some of the colour to bleed back into the image. In other words, it’s very much like the first image I discuss in my Black and White: part one tutorial; i.e. the image is a lot lighter than the original – because of the way in which the black and white conversion was carried out – but because the opacity of that layer was lowered it’s a colour rather than black and white image. To give you an idea of what I mean, take a look at the original:…