Comparison Yamaha PSR-S770 vs Casio MZ-X500

— Unweighted. Keys with a very low pressing force, literally "failing" under the fingers. This option is well suited for inexpensive synthesizers with passive mechanics (see above), but is rarely used in active models — a small resistance force makes it difficult to choose the optimal pressing force.

— Semi- weighted. Medium-strength keys, not up to the hardness of a full-fledged piano, but showing noticeably more resistance than unweighted ones. This variant is most popular among instruments with active mechanics (see above) — the force on the keys provides adequate feedback and at the same time playing such an instrument does not cause any special difficulties even for those who previously dealt only with unweighted keyboards.

— Weighted. Keys with high actuation force, comparable to that of a classical piano. Used only in professional hammer action instruments (see above) — high rigidity is a must for such mechanics (more precisely, for the response that it must provide).

The number of built-in sounds provided in the synthesizer.

The number of timbres is often described as the number of instruments that a given model can imitate. However, this is not entirely true — rather, this parameter can be called "the number of instruments and sound effects." For example, the same instrument — an electric guitar — with different "gadgets" (distortion, overdrive) will sound differently, and in the synthesizer each such gadget will be considered a separate timbre. The “drums” timbre usually combines different types of drums and other percussion instruments — in other words, it allows you to portray both the “bass drum” and the cymbals without switching settings, just by pressing the desired keys. And some timbres may not have analogues among real instruments at all.

The more built-in timbres, the more extensive the possibilities of the synthesizer, the more diverse the sounds that can be extracted from it. At the same time, in high-end models like workstations (see "Type"), this number can reach 1000 or even more.

The number of memory slots for user tones provided in the synthesizer.

For Voices in general, see “Preset Voices” above. User timbres are sound settings that were not originally provided in the synthesizer's memory and are created by the user according to their preferences. This feature is indispensable in cases where the built-in set of timbres does not contain the necessary options. However, the capabilities of the User Voices may vary from model to model. So, one instrument only allows you to edit and supplement existing timbres (for example, add a “wah-wah” effect to a bass guitar and save such a bunch as a user setting), another makes it possible to set the sound parameters almost manually, and the third even allows you to load timbres through USB (see below).

The more user timbres in the synthesizer, the more personal “instruments” you can register in its memory.

The number of auto accompaniment styles (see above) originally provided in the synthesizer, in other words, the number of accompaniment options available to the user.

The more extensive this set, the higher the probability of finding among these melodies suitable options for a particular case. At the same time, the abundance of styles in itself is not yet a 100% guarantee that among them there will be a suitable one, especially since different synthesizer models can differ markedly in a specific set of melodies. So the list does not hurt to clarify before buying. Also note that the situation can be corrected by user styles (see below) — many synthesizers with auto accompaniment support them.

The number of user auto accompaniment styles supported by the synthesizer, in other words, the number of additional styles that can be stored in memory in addition to the built-in ones. Note that styles can have different volumes (depending on the number of notes used), so this parameter often turns out to be not exact, but only an average-approximate one.

Modern synthesizers may have a fairly extensive set of built-in auto accompaniment styles (see above), but even the richest set may not contain the desired melody. Thus, many models allow you to supplement the standard list with custom melodies. The addition methods themselves can be different: in some models, these melodies need to be downloaded from external media, in others they can even be composed manually. Nevertheless, the presence of user styles allows you to expand the range of auto accompaniment melodies, moreover, at the request of the user himself.

The presence of a learning mode in the design of the synthesizer.

The purpose of this function is clear from the name. It is most often based on the following principle: the synthesizer itself tells the student which keys to press, displaying the keyboard on the display or highlighting the necessary keys using the backlight (if available, see above). Of course, at different levels of learning, the format of such prompts will also be different: for example, at the very beginning, the synthesizer highlights the necessary notes until they are pressed, and at the final stage it highlights them at the tempo at which you need to play the melody, and evaluates the accuracy of the student pressing the desired keys. There are also other features and nuances of learning — for example, the mode of separate learning of parts for the left and right hands, when the instrument itself plays one part and tells the student how to play the second. In addition, a metronome function is practically mandatory for a synthesizer with this mode (see below).

Regardless of the specific functionality, this mode will be very useful for those who are just developing their keyboard playing skills.

The range in which you can change the tempo of the programme played by the synthesizer — auto accompaniment, lesson tune (see above), metronome (see below), recorded sample, etc.

Pace is measured in beats per minute. Changing it allows you to adjust the speed of the synthesizer to the specifics of the situation — for example, slightly slow down the tutorial if it is too hard to master at the initial pace. The wider the range of tempo adjustment, the more options the musician has to choose from, especially in the area of very slow and very fast tempos.

Note that the traditional range of musical tempos covers values from 40 beats / min (“grave”, “very slowly”) to 208 beats / min (“prestissimo”, “very fast”), however, in synthesizers it can be more extensive — for example, 30 – 255 bpm.

Synthesizer support for sampling.

Samples are short sound fragments used in the creation of musical compositions. Such a fragment can contain almost any sound — from a note on a musical instrument or a fragment of a drum part to a siren signal, a bird's chirp, the sound of a mechanism, etc. Specifically, the sampling function implies the ability to use the synthesizer to record samples for further use. Recording can be done either through the built-in microphone or through the audio input (from an external microphone or other audio device). At the same time, many synthesizers with this function are able not only to keep the sound not only "as is", but also to pass the incoming signal through the processing circuits, adding various effects to it — echo, "wah-wah", metallic sound coloring, etc. And ready-made samples can usually be "bound" to individual synthesizer keys and played back in real time. Other functions are possible, depending on the level of the instrument.

— Digital. Digital audio output, usually via coaxial S/P-DIF interface. It is similar in purpose to the line outputs (see below), differs only in the type of connector and the digital signal format. It can be useful, in particular, for connecting the synthesizer to a device that does not have line inputs, or if these inputs are occupied.

— USB B. A connector designed to connect the synthesizer to a computer or laptop as a peripheral device. Such a connection provides very extensive possibilities: it allows you to load new timbres, auto accompaniment styles and melodies into the synthesizer, edit existing ones; record the played music on the computer (or rewrite the music recorded in the memory of the synthesizer itself); use the instrument as an external MIDI keyboard; change various fine settings and troubleshoot, etc. The specific functionality available with a USB connection depends on the synthesizer model.

— MIDI. Output for transmitting MIDI signals (MIDI events) to external devices. MIDI is a specialized type of digital control signal used in musical instruments. Such a signal is generated when a key is pressed, it contains data about the pressing itself (duration, strength and speed), as well as the note number; Based on this signal, as well as the set settings, the electronic “hardware” of the synthesizer generates a sound of the required duration, timbre and other characteristics. Accordingly, the MIDI output allows you to transmit MIDI events to...an external device — a sequencer, sampler, another synthesizer, a computer (although it is more convenient to connect the instrument to a computer via USB), etc. This interface can be used for various purposes — MIDI recording, playing music through an additional synthesizer if the main model does not have the desired tone, etc.

— MIDI thru. An output designed to transmit to another device MIDI events received by the synthesizer via a MIDI input (see "Inputs"). In this case, the stream of MIDI commands is transmitted unchanged, pressing the keyboard of the synthesizer does not affect it. This function can be useful in some situations where the instrument is connected to several external devices at the same time. For example, if you need to control two others at once from one synthesizer, you can compose such a system as follows: the MIDI output of the control synthesizer is connected to the MIDI input of the first controlled one, and the MIDI thru output of the first one is connected to the MIDI input of the second one. Thus, the control signal goes to the first controlled synthesizer, and, through it, to the second one, while it would be difficult to connect both instruments directly.

— Headphones. Dedicated headphone output. It usually uses a mini-Jack 3.5 mm or Jack 6.35 mm connector — the vast majority of modern headphones are equipped with the first, the second is less common in the “ears”, but more reliable, and is also compatible with 3.5 mm through a simple adapter. Using "ears" when playing the synthesizer is convenient because only the musician hears the music played — this can be useful in situations where you need to practice, but it is undesirable to make noise (for example, at late hours of the day). In addition, some instruments do not have built-in acoustics, and you can listen to them normally only through additional equipment — the role of which can be played just by headphones.