Question: Is there such a thing as an implied tie? Like some kind of symbol or notation that would specify to hold a note through the duration of all the notes on a pitch as if they were tied together. 

**Edit:** I am asking because I am wondering if there is a way to specify that instruments hold one tone (like a choir that is humming) instead of playing each note separately. The reason I am wondering is because I am using a notation program to write out some music, and then you can listen to it, and I want to hear it like a choir humming. I know about ties, but I just thought I'd check if there is such a thing in music.

**Edit:** By implied, I mean it isn't written in the music. In other words it is specified at the beginning of the part or something like that. 

**Edit:** I am using Noteworthy Composer.

Answer: 
If you want a long, sustained note, you could notate it in quite a few different ways. Below are some suggestions. Not all will actually save you time, by cutting notation, though! Each of these is only five bars long, so, obviously, you would only get any time benefit from using these techniques with longer notes.

BTW, I haven't used Noteworthy Composer before, so have no idea if they would work with that software. I used Sibelius7 for these, and all played back exactly the same (apart from the second line), i.e. with one sustained note per bar.

1. Standard Notation.
2. Similar notation using ties into rests; even though this doesn't require notes to be written, it would actually take more time to put in as the placement of the ties is fiddly. For instruments where the sound decays (eg. piano, guitar) you would usually use **l.v.** too.
3. Using **repeat-bar** marks can save a lot of time.
4. This notation is effectively the same, and plays back the same, but is less clear; it's not clear whether you attack the second note…
5. And of course, if in doubt, use text to make the intention clear in the score.

![enter image description here](https://i.stack.imgur.com/U2PXU.jpg)

With this answer I've tried to show different kinds of notation for sustained notes that would be valid within a score. Not all of them would save time if all you actually want is to hear the music (or to create a MIDI file of it, for instance). If all you want is to create a long held pitch, as quickly and easily as possible, the notation below will create the necessary effect (well, again, it works in Sibelius7, but might not in other software). But it is certainly *not* correct notation!

![enter image description here](https://i.stack.imgur.com/SYS74.jpg)
Now, just a moment... Hymns, Choir, Implicit Ties...

Could you be talking about like Gregorian Chant kind of stuff? AFIK, Gregorian Chant is distinguished in notation by having only four lines, with or without a clef, which may be any letter a-h ("No B♭, that's a Bad B♭!").

Older than that is notation based on 'neumes' which I never really understood. But neume comes from 'pneuma', greek for spirit or breath; so with both of these, the notes comprising one word of the text are to be sung as if tied together.

For software, I'd search for something with a Chant mode, or a plugin or something. This has got to be already-explored territory. 2¢