What is the capacity of the high resolution sound source?
High resolution sound source with more information than conventional CDs.
Since the data size is large, you can enjoy high-quality sound with a three-dimensional effect, but the problem is that when managing multiple high-resolution audio sources, the required storage capacity becomes huge.
Then I will introduce what is the capacity of the high resolution sound source, including the management method.
What is the capacity of Hi-Res Audio sources compared to CDs?
In determining the capacity (file size) of a high-resolution sound source, the sampling frequency and bit depth of the sound source are important factors.
The sample rate (sample rate) is a numerical value that is used as an index when converting analog data, such as speech, to a digital signal.
It indicates how many times per second an information sample was measured, and is expressed in “Hz (hertz)”.
If sampling is done every 44,100 seconds, it will be “44.1 kHz”.
On the other hand, the bit depth is a numerical value that indicates how many pieces are recorded in each divided data.
It is represented by “bit”.
Both the sample rate and the bit depth mean that the higher the number, the more information there will be, that is, the higher the resolution.
The amount of music data per second is called the bit rate.
Bit rate is the sample rate multiplied by the bit depth and is expressed in “bps”.
The calculation formula is as follows.
Bit rate (bps) = sample rate (Hz) x bit depth (bit) x 2
For example, the bit rate and sample rate of a CD sound source are generally “44.1 kHz / 16 bits”.
Most so-called “CD sound quality” sound sources are based on this number.
The size of the 5 minute 44.1 kHz / 16 bit / sound source file is about 50 MB.
But what about hi-res audio sources?
High resolution sound source capacity per song (5 minutes) varies depending on the music data format, as shown below.
WAV: 192 kHz / 24-bit: capacity for 5 minutes is 330 MB
FLAC: 192 kHz / 24 bit: capacity for 5 minutes is 200 MB
ALAC: 192 kHz / 24 bits: capacity for 5 minutes is 200 MB
What you can see from this is that the capacity of the high resolution sound source is 4 to 6 times that of the CD sound source in 5 minutes.
Large capacity high resolution music management equipment
If you download 5 high-resolution songs for 4 minutes, it will take up about 700MB (for 96kHz / 24-bit WAV files).
In the case of 10 songs, it exceeds 1400MB, that is, 1GB.
If so, I would like to have enough storage to handle that amount of data.
An effective way to do this is to build a NAS-centric network audio system that incorporates a large-capacity hard drive.
For example, if you can prepare a 4TB (terabyte) hard drive, it can store around 20,000 high-resolution songs.
Next, we will explain what NAS and network audio are like.
NAS
NAS stands for “Network Attached Storage” and it reads like aubergine.
It stands for network attached storage, and it is also called a network hard drive or network compatible HDD.
In other words, it is an external hard drive that is used when connecting to a network (LAN).
A normal external hard drive used when connecting to a PC = PC via USB etc. can basically be used with only one PC.
However, if it is a NAS, it can be used with multiple devices participating in the LAN.
Files saved on the hard drive can also be used and shared from, for example, the personal computers of each family member participating in the home LAN, smartphones connected via Wi-Fi, and TVs in the living room to be.
It is also possible to access the data on the NAS from the outside via the Internet.
The NAS is often used in the home to store and share data for music, video (video / TV recording data), photos (images), etc.
