The sound of acoustic recordings on CD is nothing compared to the way they sound on an acoustic Victrola. I have two acoustic phonographs, and the sound of Caruso on them is uncanny. It makes the hair on the back of my neck stand up, it's so present and real. In fact, I had my suitcase phonograph at Starbucks one afternoon, and a person walked onto the patio from the street "looking for the person who was singing". They didn't even realize it was a recording.
There are a few reasons why Victrolas sound better than electrical reproduction...
The first is the frequency response range. The acoustic process captures sound that exactly contains the male voice. This is why opera is so good on old 78s, and orchestral music isn't as good.
The dynamic range is 1:1. If the singer sings in a whisper, the phonograph plays it back exactly that loud. Likewise for full voice. There is no adjustment for volume on an acoustic phonograph. The gain is fixed at the exact same volume as the original performance.
The sound box... the round disk shaped compartment that holds the needle and resonating diaphragm... is better at noise reduction than the best digital filters. It doesn't reproduce any frequencies beyond the range of the recording itself. (Most noise sits above the music.) And it is unable to reproduce sharp transients. This automatically eliminates sharp tics and pops.
The horn provided a directionality to the sound and extends the frequency response to enhance the lower notes. The instruction book that came with Victrolas said to put your machine in the corner of a room, pointing toward the center. When you do this the junction of the walls in the corner acts as an extension to the horn, increasing its ability to reproduce low frequencies. Also, when the records were recorded, the performer stood a few feet in front of a large horn, which channelled through a tube to the cutting head. Playback on a Victrola is the exact mirror image of that process... the sound box plays the record and the sound goes through a tube into a horn... The eerie result of this is that you get a three dimensional image of the performer about three feet in front of the phonograph! If you have ever experienced this, you know how baffling this effect is.
Since the acoustic process was unable to record any sound more than 20 feet away from the recording horn, most acoustic records have no reverberation at all. They are totally dry. When you play them back in a fairly large living room, perhaps with bare wood floors, the room itself provides the reverberation, adding the exact same presence that one would have if they spoke or made a sound in the room. This provides a direct immediacy and sense of reality that no digital reverb can sythesize.
The frequency response of the acoustic process was very uneven. There are spikes and dips all over the spectrum. But the inaccuracy is euphonic... it actually improves the sound. When you listen to acoustic records, you don't get the sense that the frequency range is as narrow as it actually is. This is because of psycho-acoustics. The engineers at Victor, Columbia and Edison may not have known what the term "psycho acoustics" meant, but they certainly used the principle. If you add a little high frequency hiss to music, just above the range of the recording, the ears are fooled into thinking there are frequencies in the music that don't exist. Also, some frequencies mask other frequencies and some don't. The response of the Victor Exhibition soundbox is perfectly balanced to provide the illusion of having a much broader response than it actually has.
A lot of transfer engineers smooth out the spikes and end up dulling the sound considerably. But if you hear an acoustic record presented the way a contemporary phonograph reproduces it, it can sound much better than it would if you tried to make the response conform to a "natural" flat response.
Here is an example of a track I restored from a record made in 1909. Keep in mind that this record is nearly 100 years old. When I was doing the transfer and processing the sound, I referred to the way it sounded on my acoustic phonograph and tried to duplicate the sound. It's pretty darn good for 100 years old! Listen in particular to the bass drum at the beginning and end and the xylophone solo in the middle. I'd like to see more engineers use these kinds of techniques.
http://www.vintageip.com/records/VIP-RP-1001Trk18.mp3
By the way, this song is called "Porkupine Rag" and it's by Prince's Band.
See ya
Steve