User timbres
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.
Accompaniment styles
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.
Tempo change
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.
Sampling
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.
In box
Additional items supplied with the synthesizer in addition to the instrument itself.
— Music stand. A stand for musical notations, installed in such a way that the materials on it are constantly in front of the musician's eyes. In modern synthesizers, the music stand can be built-in or removable.
— Pedal. An additional control in the form of a pedal, which can be responsible for a wide variety of functions, depending on the model of the synthesizer. For more information about this, see "Connected pedals", here we note that the presence of a pedal in the kit eliminates the need to look for and select it separately.
— Power Supply. Power supply for connecting the synthesizer to the network. The very possibility of working from the outlet is important for most modern synthesizers. Therefore, the absence of a power supply in the kit means either that it is made internal, or that we have a simple and inexpensive model (usually for children, see "Type"), designed mainly for battery operation and not equipped with a PSU or not providing for it at all connections. An external power supply unit is convenient because it can be disconnected when working from autonomous power sources, saving the tool from unnecessary wires.
— Disk. Optical disk (CD or DVD) with various additional materials on the synthesizer. These can be instructions and other documentation, drivers for connecting to a computer, specialized software for editing music on a PC,...etc.
— Rack. Own stand for installing the synthesizer on the floor — usually folding, in the unfolded state resembling the letter X in shape. With such a stand, the musician does not have to look for a free table, window sill or other similar place to place the instrument — there is enough free space on the floor. Racks for synthesizers are also sold separately, but it is often more convenient or even cheaper to buy such a device along with an instrument.
— Microphone. The microphone can be used both for singing and for creating samples based on external sounds. However it is worth noting that usually relatively inexpensive synthesizers for beginner musicians are equipped with microphones — it is more convenient for a professional to independently choose additional equipment (including a microphone) to suit their own needs and preferences, without relying on the choice of the manufacturer. Accordingly, the complete microphones themselves usually have rather modest characteristics.
Power consumption
Rated power consumed by the tool during operation. Modern synthesizers, even the most powerful and advanced ones like workstations (see "Type"), consume very little energy — up to 100 W, and often noticeably less. Therefore, it is rarely necessary to pay attention to this parameter in fact, mainly in rather specific situations — for example, when working from an autonomous generator, when you need to take into account the entire load connected to such a power supply.
