Analog and Digital recording

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Analog and Digital recording

Analog frequency
Digital Frequency 

History
Since Gutenberg invented pressing machine. We have ways to make a copy of words. After German found a magnetic media. We can make a copy of sounds.

At beginning, engineers select a vinyl as media to consumers. because magnetic tapes is still expensive.

Though, vinyl is very good in tangible, cheap and beautiful packages.

Unfortunately, vinyl is still very big, unconvinient and difficult to play.

Then recording industries at that time introduced a small magnetic media called cassettes. The cassettes are small, cheap but sound quality not equal to vinyl however consumers can play and record sounds on their cassettes.

In late ’80 digital recording gradually arrived.

DAT format was introduced to studio and high end consumers.

However DAT still using magnetic tapes as a media. But records as digital or binary form.

Companies like Philip and Sony are looking on their optical media for digital recordings.

We called it CD. Everything is nearly perfect for CD. However CD needs new expensive equipments to record and play it.

Until, mp3 and iPod were introduced to market. Digital media become popular and cheaper.

Everything go well to around 2007 when questions “Is digital better than analog?” ” Can digital record perfect sound wave form?”

Vinyls and reels were back.

What’s the point?

This article like to analyze if digital is correct choice for recording?

My poor knowledge in electromagnetic told magnetic tapes <Mastering 1/2″>to record wave forms in magnetic domains.

So how good is a magnetic domains?

Not so idealistic, colloidals response some frequencies better than some frequencies.

As you can see on specification below.

ATR master

Frequencies pass band  is 20-20khz. The truth is the tapes don’t respond equally to each frequencies in the band. Some frequencies need louder to print on the tapes.

Moreover, tapes  can record maximum loud note at 86dB while normal CD can do >90dB easily.

Can we do better? Yes, with nanotechnology but…

Even we  use nano colloidal to improve tape’s response however it will be regressive  improving. Meaning move up from micro magnitude to nano magnitude we get such 3 dB improvement and we need pico magnitude to improve more 2 dB and on and on. More or less, recordable frequencies remain limited.

Results in higher and higher-end chemical equipments and costily.

SACD is easily response > 100dB.
Of course, we invented this to remove inferiors of magnetic tapes,  not mention to workflows of digital mastering are easing to everyone in record industries.

I will look to see 2048bit resolution and Sampling rate of 2048khz. Else, it would be perfect if someone can invent something that can capture analog sound wave for recording without transform the wave.

Thanks for reading!