Why not the piano as a reference for bass

To my hearing,the lowest bass of the piano lacks the texture of a stringed bass..It strikes me as the kind of one note,thump thump bass you hear coming from a ricers trunk..
 I will however note that when it comes to physical weight & body,the piano is my benchmark..

@freediver what piano are you listening to that sounds like that?

Personally, I think it is because piano live is amazing but it is difficult to reproduce well, so most systems would fall short.  I have learned that over the years about horns.  I tend to agree with you though.  A good sample of test songs should include horns and piano to test a system’s ability to enjoyably reproduce those instruments.  I don’t listen much to piano, just not my thing, but have really started to enjoy horns - feels odd to even type that because when I first started my system made horn sound terrible.  

Piano goes low but wave length impact too short 

A pipe organ much better there 

Depending on music type 

The shortness of the piano tone is the point. Stopping the overhang in the bass is a major problem for most speakers and the piano is a great test for this.

@freediver 

The piano is a stringed instrument. It is one of the best to evaluate gear. If our gear can't make a piano sound real, we are missing something. I don't know the lowest note on a piano (in hz) but it is quite low. Cello lowest notes are 30 hz, I believe, also a nice indicator of how your system sounds. Pipe organ is probably best for the very lowest notes or some synthesized music as there is pretty much no limit to what digital is able to do. Lowest pipe organ notes are 8 hz from 64 foot pipes but more recordings will include 16 hz from 32 foot pipes. It's the lowest I've heard on a recording (D2D vinyl).. I believe the piano is one of the toughest instruments to reproduce through a stereo system and many do use it as a reference, including myself. Not necessarily for the bass but the bass is indeed quite low. 

I think that the "attack" has a lot to do with it.  Whereas a bass is "plucked" by hand or played with a pick, a piano is struck with a felt-covered hammer and this presents a completely different "leading edge."

Steinway, Baldwin, Yamaha,  Grand, Spinet.....they all sound different

Double bass can go as low as 31 Hz, but only on five-string instruments or when equipped with a low C extension. The lowest note on a standard four-string double bass is typically an E1, which vibrates at approximately 41 Hz. However, some five-string basses have a low B string (tuned to B0), which is around 31 Hz. Similarly, some four-string basses have a low C extension that can reach down to 33 Hz. So double bass is a good instrument as a reference for low bass.

On  the other hand, yes piano can go as low as 27.5 Hz. However, modern piano started to take its present form much later than Beethoven or Mozart time periods. While the specific frequency of the lowest note on Beethoven's piano is unknown, the range was limited compared to modern pianos. The lowest note was typically F1 (around 43.65 Hz) or C1 (around 32.70 Hz), depending on the instrument. So typically one may not hear the lowest note of the modern piano when listening to Beethoven or Mozart's works. And I am not 100% sure how many times one will hear the lowest note in jazz piano either, but I could be wrong.

Hence, in my opinion the double bass is a more reliable reference of the bass than piano considering the how often one can hear these lower notes. One can clearly hear the purring of the double bass in jazz ensembles most of the time right in the middle of the sound stage. It would be interesting to hear from those who know how often one hear the lowest note of the modern piano (27.5 Hz) in classical and jazz music. 

The difficulty in using piano as a reference for bass response is that very few pieces stay down in the low bass for long enough. And the bass part is usually complementary to what's being played in the right hand so cognitively it's difficult to just listen to the bass part by itself. And if it' a grand piano, it usually has a lot of reverberation so the ADSR envelope of the notes is very different to an acoustic or electric bass. But of course, piano is still useful for gauging the bass response of system at frequencies that a string bass does not reach. Synthesisers are arguably even more useful. 

Okay so I didn't  clearly articulate my opinion of the extreme low bass on the piano..YES I know it is a stringed instrument but again I stand by my take on it's lack of texture compared to a plucked or bowed bass..
 I believe @toddalin reply explains exactly why I hear it as one note thump thump instead of the resonating,detailed and expressive bass I hear from say a cello or stand up double bass..

problem with the piano as a particular bass instrument is its relative lack of portability. that aside, unless it is miked closely, the bass fundamental lacks sufficient volume to poke through a dense mix. that said, the Beatles used the left hand piano notes as the bass line in at least one song ["for you blue"], and pianist Jess Stacy used his left hand as the bass line in several songs performed in concert with Benny Goodman at his seminal '38 Carnegie Hall jazz concert. unfortunately in that case the abysmal recording quality resulted in Gene Krupa's booming kick drum and floor tom drowning out most of Stacy's otherwise well-done bass line.

I still think of Ray Manzarek playing all Doors bass lines on his foot pedals.  Always correct bass, always Awesome.  Still play them occasionally.

Gimme the bass at about the 9 minute mark of Russia on Ice by Porcupine Tree, audiophile nerds.

Actually, no..., Ray played a Fender Rhodes Piano Bass with his left hand.  He never played pedals.

In several of their tracks, he is overdubbed by a bass guitar.

https://youtu.be/Fiq9VDkGVnI

@freediver 

As we all know, a piano is a percussion instrument.

It's Geddy Lee on the Moog Taurus if you want bass pedals in rock.

I understand the Bosendorfer Imperial piano has an extra register at the bottom end of the scale and will play down to 16.5Hz.   I’ve not heard one on a recording, but my College had one in the Hall, and it was mighty powerful when well played!

@Freediver, thank you for reminding me of this.   Now I’ve got to hunt for a recording!

@freediver 

I wasn't trying to give you a hard time. Just struck me as funny that you wouldn't think of a piano as a stringed instrument and I know that you realize that it is. As others point out, the deepest bass notes on the piano are often accompanied by other notes and are often short in duration, unless the sustain pedal is used for more than a second or so. I'm sure we all know all this stuff. Also, pointing out the new Bosendorfer and I think some other makers having the extended bass pianos. I've not heard one yet except on computer video, doesn't quite do it justice. 

This is all interesting reading. 

@guscreek  Interesting question.

Hence, in my opinion the double bass is a more reliable reference of the bass than piano considering the how often one can hear these lower notes. One can clearly hear the purring of the double bass in jazz ensembles most of the time right in the middle of the sound stage. It would be interesting to hear from those who know how often one hear the lowest note of the modern piano (27.5 Hz) in classical and jazz music. 

@toddalin  Terrific answer. Do you play?

Played clarinet from 5th through 12th and keyboards in a garage band in the late 60s early 70s.

Had equipment to die for back then (Hammond, Hohner, Vox, Farfisa, Moog and EML synths), but sold it off to pay for college. 

Another thought on the topic.  You hear basses go down to their low E-string literally all the time, so people have a feel for it (did someone say reference?).

But how often you you hear a piano playing low A?

After seeing Dick Contino I took up the Accordion. By the fifth grade the Clarinet was the only instrument open. I simply didn't practice enough and got the boot. Devastating at that age. Meh...

When I got to High school Paul Jackson soon to be Herbie's Bassist on Head Hunters was playing upright in the school combo. Why he took the time to introduce a freshman / surfer to the Bass took me a while to understand. He later mentioned quarter notes were the first notes I played without any coaching. Sweet man.

B3? My aching back. 

As to the Doors, I would hope that one's system allows them to differentiate the sound of a bass guitar...,

https://youtu.be/ptA39Awo0FE

and a Rhodes Piano bass...,

https://youtu.be/nOJSmXSFCWk

It should also be obvious as to whether Ray is playing a Hammond, a Vox, or a Gibson organ in each cut.

Piano bass limited in bass energy and duration and thus limited to be used in evaluation.  However, if piano bass is individually important, no reason for that particular person to not target piano bass excellence.

Also, bass preferences can differ - some seek bass energy, while others target better fidelity

The late great Oscar Peterson was gifted a Bosendorfer late in life and he used that low register a lot.  If you can find recordings by Telarc you might hear it.  Also the series "Exclusively For My Friends" originally recorded on BASF in the Black Forest has him playing on a Bosendorfer that I believe has those low notes.   There is also a great recording by Ahmad Jamal entitled "Ballades" on Harcourt of Paris that captures the full scale of the piano magnificently.  

Piano is great and offers something Bass fiddle does not!  Check out recording such as Jin Ju playing Schumann Fantasie in C opus 17 (available on Qobuz) 3rd movement, between 2:20-30 min mark, Steinway 1901 Concert Grand Piano D per the liner notes. 

…the Piano can play bass notes quietly (hence the full name of the instrument - piano forte).  While these low notes may seem anti-climactic for some, the low register of a good piano has an attack to it, especially when played softly, that is beautiful along with tone and overtones, and decay of the note.  A fiddle is generally played loud and consistent in attack, and generally all the low notes all the time (so it’s convenient for use in evaluation as well as what the instrument offers in its own right), whereas piano is playing usually higher notes as well and more often.  So you need the right recording.  I’m not saying a bass fiddle can’t play notes quietly but the piano is pretty unique in what it does.  If a system can produce these notes well, it is challenging.  “One note bass” from some drums or techno or pop music is one indicator of bass but misses a lot in sonority and tone.  

Testing bass response with piano music is a good test- even for integrating subwoofers. 

However it is too limiting and will not reveal other musically important bass qualities that one looks for.  

Great post and comments.  I also wondered about this too. Having access to a Grand and a choir (church) playing weekly, I get to listen to the Grand. I believe based on my hearing, i can get close BUT not the same, no matter what format i use.. Yes the lower registers and overhangs is where there is a noticeable difference.

@toddalin 

Whereas a bass is "plucked" by hand or played with a pick, a piano is struck with a felt-covered hammer and this presents a completely different "leading edge."

If we are talking double bass, in most classical music it is mainly bowed and in a big orchestral piece there might be eight or so playing in unison. There is no other sound like that with as much character!

I find piano recordings to be largely unrealistic- either too closely mic’d or a portrait in miniature but often lacking the gravitas of a big concert grand. I’ve had some large concert sized grands in homes- there is a growl to the lower bass that is not evident on most recordings. I use piano recordings (a few select ones) to judge the attack and decay envelope of a system. I typically use simple recordings of small combo jazz to evaluate how "real" the bass sounds- I’m a big fan of Cecil McBee-- almost every record he appears on has something interesting and I’ve gotten my system to the point where the bass sounds very filled in and dimensional, not just a faint hologram, and you can hear the positioning of the instrument relative to others on the stage as well as its height-- very convincing sounding as a full-sized instrument. This was the result of a bigger room, the use of a pair of DSP’d 15" subs that were dialed in by ear after some basic measurements and a change of phono cartridge that gave me the gravitas that seemed to be lacking using Avantgarde Duos and Lamm ML2s. 

Pianos are percussion instruments according to the Hornbostel-Sachs system of categorizing musical instruments. It belongs to the percussion family because it produces sounds by striking the strings with a felt covered hammers. It is often miscategorized as a string instrument because it has strings. A pipe organ is the better choice for testing bass response. A Pipe organ which is a wind instrument, can produce very low notes, all the way down to 16 Hz, which is lower than what most full-range speakers can reproduce without a very good subwoofer.

alexlewis3

Pianos are percussion instruments according to the Hornbostel-Sachs system of categorizing musical instruments. It belongs to the percussion family because it produces sounds by striking the strings ...

You are mistaken. The piano is classified as 314.122, considered a "cordophone" because they "produce their sounds by means of the vibration of a string or strings that are stretched between fixed points." More info here.

Percussion instruments are classified idiophones.

@richardbrand 

https://youtu.be/XBXUP5GqYJs

I was once tasked with designing a speaker system for amplifying electric piano. So I had to figure out how low in frequency the speaker system needed to go.  Well it turns out that the fundamental of the 27.5 Hz low-A is down in level so much that it is of negligible audible significance.  And, likewise its first overtone at 55 Hz!  In fact a piano's lowest audibly significant frequency is the 62 Hz first overtone of low-B.  So that was my target, and the customer liked the cab enough that he ordered a second one. 

Anyway, my point is, while piano DOES have very low frequency fundamentals, the energy of those fundamentals (and in some cases even their first overtone) is so low in level that, imo, piano is not really a suitable instrument for evaluating a speaker's bass response.

Duke