Back to Basic – Understanding Audio Processing :
Let’s start with the basic of the BASICs, Figure 2 is the block diagram of an analog processing in a home environment setup while Figure 3 shows the modern digital processing. Which one is better?
Our fellow audio hobbyist and audiophile would prefer to build their own power amplifier, a specially crafted and far superior than commercial amplifier — to build transistor design in class A or class AB or even a more serious to use the vacuum tube for unparallel listening pleasure. On the other hand, commercial audio amplifier is now design digitally.
To answer the question correctly, “which one is better” you have the chance to build our diy DNY40W power amplifier and build another digital class D amplifier and let your sense experienced the answer – – – – if my old uncle is right or wrong.
Music Source Recorded music on media like LP, cassette tape or CD player, it is played on the player with analog low-level output, typical signal level is 0.7~2.0 Vrms.
Tonal Processing Normally composed of a Bass and Treble control to Boost or Cut the low and high frequencies according to user preference
Amplification Amplify the low-level input signal (0.7 to 2 Vrms) from the tone control into much higher signal voltage swing at the speaker (ex. 18Vrms)
Sound Conversion The speaker will convert the “sound electrical signal” into sound waves which our ears can understand.
Music Source Modern digital media with direct digital ouput as USB, Coax, optical and Blue-tooth A2DP (Advance Aduio Distribution Profile)
Tonal Processing It implement DSP processing runs by software, where it used se-veral algorithm for diffe-rent processing environments like Pop, Jazz, Wide, Tube, Heavy,etc.
Amplification Amplify the low level signal from the DSP in digital PCM, it used appropriate technique such as DPP (digital power processing) technology.
Sound Conversion The speaker will convert the “pseudo electrical signal” (converted digital signal into analog or D/A) into sound waves which our ears can understand.