Method for processing single or multiple rovings in a device, wherein - a work roving and a reserve roving or at least two work rovings and at least two reserve rovings are provided from a creel by several unwinding processes, a reserve roving being assigned to each work roving; and - in a roving joining process with a splice bar which is horizontally aligned in a width direction of the device lying 90° to a main roving conveying direction, the respective work roving(s) is / are spliced with the respectively assigned reserve roving(s) in at least one splice unit of the splice bar assigned to the work roving / reserve roving pair(s) to be formed and each having two splice unit parts (31, 32), wherein - in a reserve roving fixing step, the reserve roving(s) to be spliced with the work roving(s) is / are fixed to the splice bar; - during a braking process, the conveying speed of the work roving to be spliced with the assigned reserve roving(s) is decelerated from a basic speed to a splicing speed; - in at least one alignment step, the splice bar with the reserve roving(s) fixed thereon is accelerated from a basic position to the splicing speed and brought into a splicing plane; - in an approaching step, at least one of the splice unit parts is moved towards the other splice unit part; - in a splicing step, the respective work roving(s) is / are spliced with the respectively assigned reserve roving(s) in the splicing position by supplying compressed air; and - in a moving-away step, at least one of the splice unit parts is moved away from the other splice unit part; - in a release process subsequent to the roving joining process, the reserve roving(s) spliced with the work roving(s) is / are detached from the splice bar and reused as (a) new work roving(s); and - the splice bar is brought into the basic position after the release process. - a work roving and a reserve roving or at least two work rovings and at least two reserve rovings are provided from a creel by several unwinding processes, a reserve roving being assigned to each work roving; and - in a roving joining process with a splice bar which is horizontally aligned in a width direction of the device lying 90° to a main roving conveying direction, the respective work roving(s) is / are spliced with the respectively assigned reserve roving(s) in at least one splice unit of the splice bar assigned to the work roving / reserve roving pair(s) to be formed and each having two splice unit parts (31, 32), wherein - in a reserve roving fixing step, the reserve roving(s) to be spliced with the work roving(s) is / are fixed to the splice bar; - during a braking process, the conveying speed of the work roving to be spliced with the assigned reserve roving(s) is decelerated from a basic speed to a splicing speed; - in at least one alignment step, the splice bar with the reserve roving(s) fixed thereon is accelerated from a basic position to the splicing speed and brought into a splicing plane; - in an approaching step, at least one of the splice unit parts is moved towards the other splice unit part; - in a splicing step, the respective work roving(s) is / are spliced with the respectively assigned reserve roving(s) in the splicing position by supplying compressed air; and - in a moving-away step, at least one of the splice unit parts is moved away from the other splice unit part; - in a reserve roving fixing step, the reserve roving(s) to be spliced with the work roving(s) is / are fixed to the splice bar; - during a braking process, the conveying speed of the work roving to be spliced with the assigned reserve roving(s) is decelerated from a basic speed to a splicing speed; - in at least one alignment step, the splice bar with the reserve roving(s) fixed thereon is accelerated from a basic position to the splicing speed and brought into a splicing plane; - in an approaching step, at least one of the splice unit parts is moved towards the other splice unit part; - in a splicing step, the respective work roving(s) is / are spliced with the respectively assigned reserve roving(s) in the splicing position by supplying compressed air; and - in a moving-away step, at least one of the splice unit parts is moved away from the other splice unit part; - in a release process subsequent to the roving joining process, the reserve roving(s) spliced with the work roving(s) is / are detached from the splice bar and reused as (a) new work roving(s); and - the splice bar is brought into the basic position after the release process.