# Channel priority and vol0 virtual

**URL:** <https://qa.fmod.com/t/channel-priority-and-vol0-virtual/16142>\
**Category:** FMOD Engine\
**Created:** [September 4, 2020, 6:05am UTC](https://qa.fmod.com/t/channel-priority-and-vol0-virtual/16142 "2020-09-04T06:05:40Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![LemonTree](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@LemonTree](https://qa.fmod.com/u/LemonTree)\
**Post date:** [September 4, 2020, 6:05am UTC](https://qa.fmod.com/t/channel-priority-and-vol0-virtual/16142/1 "2020-09-04T06:05:40Z")

</div>

hi Mathew  
i had use FMOD\_INIT\_VOL0\_BECOMES\_VIRTUAL in system init and allocate 0.01 to it.But when I use FMOD\_Channel\_setPriority make some channel priority to high, i see the channels always real channel though the audibility is 0,lower priority channel never chance stolen real channel.if i need a high priority be stolen by those with a lower priority when it in audibility is 0, what shall i do?

---

<div class="post-metadata">

**Author:** ![LemonTree](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@LemonTree](https://qa.fmod.com/u/LemonTree)\
**Post date:** [September 4, 2020, 6:09am UTC](https://qa.fmod.com/t/channel-priority-and-vol0-virtual/16142/2 "2020-09-04T06:09:01Z")

</div>

![88979d5f-9e63-4200-9ab7-6c5e319cfb6a](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/b/ba6d91f33cffb771b06bc23a30dc78ada5c4fdb3.png)  
 ![71048b84-7e80-4081-a21a-c65511cd0126](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/7/71836602997c6816777a38dcb3484785d00ef816.png)  
I see different expressions in the developer’s documentation, so I’m a little confused

---

<div class="post-metadata">

**Author:** ![mathew](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/mathew/32/431_2.png) [@mathew](https://qa.fmod.com/u/mathew)\
**Post date:** [September 6, 2020, 11:36pm UTC](https://qa.fmod.com/t/channel-priority-and-vol0-virtual/16142/3 "2020-09-06T23:36:11Z")

</div>

Firstly the priority system is a bucket list, i.e. all sounds in a lower priority grouping will go virtual before any in a higher grouping go virtual. The vol0 virtual flag will make any sound below your specified threshold go virtual regardless of priority **unless** the priority is set to 0 (highest), that special priority ensure a sound never goes virtual.

---

<div class="post-metadata">

**Author:** ![LemonTree](https://avatars.discourse-cdn.com/v4/letter/l/dbc845/32.png) [@LemonTree](https://qa.fmod.com/u/LemonTree)\
**Post date:** [September 7, 2020, 7:40am UTC](https://qa.fmod.com/t/channel-priority-and-vol0-virtual/16142/4 "2020-09-07T07:40:40Z")

</div>

Thank you, Mathew. I got it.